20490340

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78809}}^1$

素因数の和:78831

約数の個数: 24

約数和(自身を含む): 46340280

約数和(自身を除く): 25849940

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78809, 157618, 315236, 394045, 788090, 1024517, 1576180, 2049034, 4098068, 5122585, 10245170, 20490340]

約数ペア:

[(1, 20490340), (2, 10245170), (4, 5122585), (5, 4098068), (10, 2049034), (13, 1576180), (20, 1024517), (26, 788090), (52, 394045), (65, 315236), (130, 157618), (260, 78809)]