20741240

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{39887}}^1$

素因数の和:39911

約数の個数: 32

約数和(自身を含む): 50258880

約数和(自身を除く): 29517640

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 39887, 79774, 159548, 199435, 319096, 398870, 518531, 797740, 1037062, 1595480, 2074124, 2592655, 4148248, 5185310, 10370620, 20741240]

約数ペア:

[(1, 20741240), (2, 10370620), (4, 5185310), (5, 4148248), (8, 2592655), (10, 2074124), (13, 1595480), (20, 1037062), (26, 797740), (40, 518531), (52, 398870), (65, 319096), (104, 199435), (130, 159548), (260, 79774), (520, 39887)]