20406620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78487}}^1$

素因数の和:78509

約数の個数: 24

約数和(自身を含む): 46150944

約数和(自身を除く): 25744324

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78487, 156974, 313948, 392435, 784870, 1020331, 1569740, 2040662, 4081324, 5101655, 10203310, 20406620]

約数ペア:

[(1, 20406620), (2, 10203310), (4, 5101655), (5, 4081324), (10, 2040662), (13, 1569740), (20, 1020331), (26, 784870), (52, 392435), (65, 313948), (130, 156974), (260, 78487)]