20738640

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^2\times {\mathrm{23}}^1$

素因数の和:86

約数の個数: 240

約数和(自身を含む): 76745088

約数和(自身を除く): 56006448

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 20, 23, 24, 26, 30, 34, 39, 40, 46, 48, 51, 52, 60, 65, 68, 69, 78, 80, 85, 92, 102, 104, 115, 120, 130, 136, 138, 156, 170, 184, 195, 204, 208, 221, 230, 240, 255, 260, 272, 276, 289, 299, 312, 340, 345, 368, 390, 391, 408, 442, 460, 510, 520, 552, 578, 598, 624, 663, 680, 690, 780, 782, 816, 867, 884, 897, 920, 1020, 1040, 1104, 1105, 1156, 1173, 1196, 1326, 1360, 1380, 1445, 1495, 1560, 1564, 1734, 1768, 1794, 1840, 1955, 2040, 2210, 2312, 2346, 2392, 2652, 2760, 2890, 2990, 3120, 3128, 3315, 3468, 3536, 3588, 3757, 3910, 4080, 4335, 4420, 4485, 4624, 4692, 4784, 5083, 5304, 5520, 5780, 5865, 5980, 6256, 6630, 6647, 6936, 7176, 7514, 7820, 8670, 8840, 8970, 9384, 10166, 10608, 11271, 11560, 11730, 11960, 13260, 13294, 13872, 14352, 15028, 15249, 15640, 17340, 17680, 17940, 18768, 18785, 19941, 20332, 22542, 23120, 23460, 23920, 25415, 26520, 26588, 30056, 30498, 31280, 33235, 34680, 35880, 37570, 39882, 40664, 45084, 46920, 50830, 53040, 53176, 56355, 60112, 60996, 66470, 69360, 71760, 75140, 76245, 79764, 81328, 86411, 90168, 93840, 99705, 101660, 106352, 112710, 121992, 132940, 150280, 152490, 159528, 172822, 180336, 199410, 203320, 225420, 243984, 259233, 265880, 300560, 304980, 319056, 345644, 398820, 406640, 432055, 450840, 518466, 531760, 609960, 691288, 797640, 864110, 901680, 1036932, 1219920, 1296165, 1382576, 1595280, 1728220, 2073864, 2592330, 3456440, 4147728, 5184660, 6912880, 10369320, 20738640]

約数ペア:

[(1, 20738640), (2, 10369320), (3, 6912880), (4, 5184660), (5, 4147728), (6, 3456440), (8, 2592330), (10, 2073864), (12, 1728220), (13, 1595280), (15, 1382576), (16, 1296165), (17, 1219920), (20, 1036932), (23, 901680), (24, 864110), (26, 797640), (30, 691288), (34, 609960), (39, 531760), (40, 518466), (46, 450840), (48, 432055), (51, 406640), (52, 398820), (60, 345644), (65, 319056), (68, 304980), (69, 300560), (78, 265880), (80, 259233), (85, 243984), (92, 225420), (102, 203320), (104, 199410), (115, 180336), (120, 172822), (130, 159528), (136, 152490), (138, 150280), (156, 132940), (170, 121992), (184, 112710), (195, 106352), (204, 101660), (208, 99705), (221, 93840), (230, 90168), (240, 86411), (255, 81328), (260, 79764), (272, 76245), (276, 75140), (289, 71760), (299, 69360), (312, 66470), (340, 60996), (345, 60112), (368, 56355), (390, 53176), (391, 53040), (408, 50830), (442, 46920), (460, 45084), (510, 40664), (520, 39882), (552, 37570), (578, 35880), (598, 34680), (624, 33235), (663, 31280), (680, 30498), (690, 30056), (780, 26588), (782, 26520), (816, 25415), (867, 23920), (884, 23460), (897, 23120), (920, 22542), (1020, 20332), (1040, 19941), (1104, 18785), (1105, 18768), (1156, 17940), (1173, 17680), (1196, 17340), (1326, 15640), (1360, 15249), (1380, 15028), (1445, 14352), (1495, 13872), (1560, 13294), (1564, 13260), (1734, 11960), (1768, 11730), (1794, 11560), (1840, 11271), (1955, 10608), (2040, 10166), (2210, 9384), (2312, 8970), (2346, 8840), (2392, 8670), (2652, 7820), (2760, 7514), (2890, 7176), (2990, 6936), (3120, 6647), (3128, 6630), (3315, 6256), (3468, 5980), (3536, 5865), (3588, 5780), (3757, 5520), (3910, 5304), (4080, 5083), (4335, 4784), (4420, 4692), (4485, 4624)]