21649160

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1$

素因数の和:151

約数の個数: 128

約数和(自身を含む): 58060800

約数和(自身を除く): 36411640

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 31, 34, 40, 52, 62, 65, 68, 79, 85, 104, 124, 130, 136, 155, 158, 170, 221, 248, 260, 310, 316, 340, 395, 403, 442, 520, 527, 620, 632, 680, 790, 806, 884, 1027, 1054, 1105, 1240, 1343, 1580, 1612, 1768, 2015, 2054, 2108, 2210, 2449, 2635, 2686, 3160, 3224, 4030, 4108, 4216, 4420, 4898, 5135, 5270, 5372, 6715, 6851, 8060, 8216, 8840, 9796, 10270, 10540, 10744, 12245, 13430, 13702, 16120, 17459, 19592, 20540, 21080, 24490, 26860, 27404, 31837, 34255, 34918, 41080, 41633, 48980, 53720, 54808, 63674, 68510, 69836, 83266, 87295, 97960, 127348, 137020, 139672, 159185, 166532, 174590, 208165, 254696, 274040, 318370, 333064, 349180, 416330, 541229, 636740, 698360, 832660, 1082458, 1273480, 1665320, 2164916, 2706145, 4329832, 5412290, 10824580, 21649160]

約数ペア:

[(1, 21649160), (2, 10824580), (4, 5412290), (5, 4329832), (8, 2706145), (10, 2164916), (13, 1665320), (17, 1273480), (20, 1082458), (26, 832660), (31, 698360), (34, 636740), (40, 541229), (52, 416330), (62, 349180), (65, 333064), (68, 318370), (79, 274040), (85, 254696), (104, 208165), (124, 174590), (130, 166532), (136, 159185), (155, 139672), (158, 137020), (170, 127348), (221, 97960), (248, 87295), (260, 83266), (310, 69836), (316, 68510), (340, 63674), (395, 54808), (403, 53720), (442, 48980), (520, 41633), (527, 41080), (620, 34918), (632, 34255), (680, 31837), (790, 27404), (806, 26860), (884, 24490), (1027, 21080), (1054, 20540), (1105, 19592), (1240, 17459), (1343, 16120), (1580, 13702), (1612, 13430), (1768, 12245), (2015, 10744), (2054, 10540), (2108, 10270), (2210, 9796), (2449, 8840), (2635, 8216), (2686, 8060), (3160, 6851), (3224, 6715), (4030, 5372), (4108, 5270), (4216, 5135), (4420, 4898)]