20512201970

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{421}}^1\times {\mathrm{374789}}^1$

素因数の和:375230

約数の個数: 32

約数和(自身を含む): 39856667760

約数和(自身を除く): 19344465790

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 421, 842, 2105, 4210, 5473, 10946, 27365, 54730, 374789, 749578, 1873945, 3747890, 4872257, 9744514, 24361285, 48722570, 157786169, 315572338, 788930845, 1577861690, 2051220197, 4102440394, 10256100985, 20512201970]

約数ペア:

[(1, 20512201970), (2, 10256100985), (5, 4102440394), (10, 2051220197), (13, 1577861690), (26, 788930845), (65, 315572338), (130, 157786169), (421, 48722570), (842, 24361285), (2105, 9744514), (4210, 4872257), (5473, 3747890), (10946, 1873945), (27365, 749578), (54730, 374789)]