21056880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{397}}^1$

素因数の和:443

約数の個数: 160

約数和(自身を含む): 74620224

約数和(自身を除く): 53563344

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 16, 17, 20, 24, 26, 30, 34, 39, 40, 48, 51, 52, 60, 65, 68, 78, 80, 85, 102, 104, 120, 130, 136, 156, 170, 195, 204, 208, 221, 240, 255, 260, 272, 312, 340, 390, 397, 408, 442, 510, 520, 624, 663, 680, 780, 794, 816, 884, 1020, 1040, 1105, 1191, 1326, 1360, 1560, 1588, 1768, 1985, 2040, 2210, 2382, 2652, 3120, 3176, 3315, 3536, 3970, 4080, 4420, 4764, 5161, 5304, 5955, 6352, 6630, 6749, 7940, 8840, 9528, 10322, 10608, 11910, 13260, 13498, 15483, 15880, 17680, 19056, 20247, 20644, 23820, 25805, 26520, 26996, 30966, 31760, 33745, 40494, 41288, 47640, 51610, 53040, 53992, 61932, 67490, 77415, 80988, 82576, 87737, 95280, 101235, 103220, 107984, 123864, 134980, 154830, 161976, 175474, 202470, 206440, 247728, 263211, 269960, 309660, 323952, 350948, 404940, 412880, 438685, 526422, 539920, 619320, 701896, 809880, 877370, 1052844, 1238640, 1316055, 1403792, 1619760, 1754740, 2105688, 2632110, 3509480, 4211376, 5264220, 7018960, 10528440, 21056880]

約数ペア:

[(1, 21056880), (2, 10528440), (3, 7018960), (4, 5264220), (5, 4211376), (6, 3509480), (8, 2632110), (10, 2105688), (12, 1754740), (13, 1619760), (15, 1403792), (16, 1316055), (17, 1238640), (20, 1052844), (24, 877370), (26, 809880), (30, 701896), (34, 619320), (39, 539920), (40, 526422), (48, 438685), (51, 412880), (52, 404940), (60, 350948), (65, 323952), (68, 309660), (78, 269960), (80, 263211), (85, 247728), (102, 206440), (104, 202470), (120, 175474), (130, 161976), (136, 154830), (156, 134980), (170, 123864), (195, 107984), (204, 103220), (208, 101235), (221, 95280), (240, 87737), (255, 82576), (260, 80988), (272, 77415), (312, 67490), (340, 61932), (390, 53992), (397, 53040), (408, 51610), (442, 47640), (510, 41288), (520, 40494), (624, 33745), (663, 31760), (680, 30966), (780, 26996), (794, 26520), (816, 25805), (884, 23820), (1020, 20644), (1040, 20247), (1105, 19056), (1191, 17680), (1326, 15880), (1360, 15483), (1560, 13498), (1588, 13260), (1768, 11910), (1985, 10608), (2040, 10322), (2210, 9528), (2382, 8840), (2652, 7940), (3120, 6749), (3176, 6630), (3315, 6352), (3536, 5955), (3970, 5304), (4080, 5161), (4420, 4764)]