21296080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{20477}}^1$

素因数の和:20503

約数の個数: 40

約数和(自身を含む): 53324712

約数和(自身を除く): 32028632

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 208, 260, 520, 1040, 20477, 40954, 81908, 102385, 163816, 204770, 266201, 327632, 409540, 532402, 819080, 1064804, 1331005, 1638160, 2129608, 2662010, 4259216, 5324020, 10648040, 21296080]

約数ペア:

[(1, 21296080), (2, 10648040), (4, 5324020), (5, 4259216), (8, 2662010), (10, 2129608), (13, 1638160), (16, 1331005), (20, 1064804), (26, 819080), (40, 532402), (52, 409540), (65, 327632), (80, 266201), (104, 204770), (130, 163816), (208, 102385), (260, 81908), (520, 40954), (1040, 20477)]