21551920

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{53}}^1$

素因数の和:119

約数の個数: 160

約数和(自身を含む): 60746112

約数和(自身を除く): 39194192

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 17, 20, 23, 26, 34, 40, 46, 52, 53, 65, 68, 80, 85, 92, 104, 106, 115, 130, 136, 170, 184, 208, 212, 221, 230, 260, 265, 272, 299, 340, 368, 391, 424, 442, 460, 520, 530, 598, 680, 689, 782, 848, 884, 901, 920, 1040, 1060, 1105, 1196, 1219, 1360, 1378, 1495, 1564, 1768, 1802, 1840, 1955, 2120, 2210, 2392, 2438, 2756, 2990, 3128, 3445, 3536, 3604, 3910, 4240, 4420, 4505, 4784, 4876, 5083, 5512, 5980, 6095, 6256, 6890, 7208, 7820, 8840, 9010, 9752, 10166, 11024, 11713, 11960, 12190, 13780, 14416, 15640, 15847, 17680, 18020, 19504, 20332, 20723, 23426, 23920, 24380, 25415, 27560, 31280, 31694, 36040, 40664, 41446, 46852, 48760, 50830, 55120, 58565, 63388, 72080, 79235, 81328, 82892, 93704, 97520, 101660, 103615, 117130, 126776, 158470, 165784, 187408, 203320, 207230, 234260, 253552, 269399, 316940, 331568, 406640, 414460, 468520, 538798, 633880, 828920, 937040, 1077596, 1267760, 1346995, 1657840, 2155192, 2693990, 4310384, 5387980, 10775960, 21551920]

約数ペア:

[(1, 21551920), (2, 10775960), (4, 5387980), (5, 4310384), (8, 2693990), (10, 2155192), (13, 1657840), (16, 1346995), (17, 1267760), (20, 1077596), (23, 937040), (26, 828920), (34, 633880), (40, 538798), (46, 468520), (52, 414460), (53, 406640), (65, 331568), (68, 316940), (80, 269399), (85, 253552), (92, 234260), (104, 207230), (106, 203320), (115, 187408), (130, 165784), (136, 158470), (170, 126776), (184, 117130), (208, 103615), (212, 101660), (221, 97520), (230, 93704), (260, 82892), (265, 81328), (272, 79235), (299, 72080), (340, 63388), (368, 58565), (391, 55120), (424, 50830), (442, 48760), (460, 46852), (520, 41446), (530, 40664), (598, 36040), (680, 31694), (689, 31280), (782, 27560), (848, 25415), (884, 24380), (901, 23920), (920, 23426), (1040, 20723), (1060, 20332), (1105, 19504), (1196, 18020), (1219, 17680), (1360, 15847), (1378, 15640), (1495, 14416), (1564, 13780), (1768, 12190), (1802, 11960), (1840, 11713), (1955, 11024), (2120, 10166), (2210, 9752), (2392, 9010), (2438, 8840), (2756, 7820), (2990, 7208), (3128, 6890), (3445, 6256), (3536, 6095), (3604, 5980), (3910, 5512), (4240, 5083), (4420, 4876), (4505, 4784)]