21761840

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{103}}^1\times {\mathrm{139}}^1$

素因数の和:274

約数の個数: 80

約数和(自身を含む): 54163200

約数和(自身を除く): 32401360

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 103, 139, 152, 190, 206, 278, 304, 380, 412, 515, 556, 695, 760, 824, 1030, 1112, 1390, 1520, 1648, 1957, 2060, 2224, 2641, 2780, 3914, 4120, 5282, 5560, 7828, 8240, 9785, 10564, 11120, 13205, 14317, 15656, 19570, 21128, 26410, 28634, 31312, 39140, 42256, 52820, 57268, 71585, 78280, 105640, 114536, 143170, 156560, 211280, 229072, 272023, 286340, 544046, 572680, 1088092, 1145360, 1360115, 2176184, 2720230, 4352368, 5440460, 10880920, 21761840]

約数ペア:

[(1, 21761840), (2, 10880920), (4, 5440460), (5, 4352368), (8, 2720230), (10, 2176184), (16, 1360115), (19, 1145360), (20, 1088092), (38, 572680), (40, 544046), (76, 286340), (80, 272023), (95, 229072), (103, 211280), (139, 156560), (152, 143170), (190, 114536), (206, 105640), (278, 78280), (304, 71585), (380, 57268), (412, 52820), (515, 42256), (556, 39140), (695, 31312), (760, 28634), (824, 26410), (1030, 21128), (1112, 19570), (1390, 15656), (1520, 14317), (1648, 13205), (1957, 11120), (2060, 10564), (2224, 9785), (2641, 8240), (2780, 7828), (3914, 5560), (4120, 5282)]