20531380

素因数分解:

$2^2\times 5^1\times {\mathrm{61}}^1\times {\mathrm{16829}}^1$

素因数の和:16899

約数の個数: 24

約数和(自身を含む): 43825320

約数和(自身を除く): 23293940

約数列:

[1, 2, 4, 5, 10, 20, 61, 122, 244, 305, 610, 1220, 16829, 33658, 67316, 84145, 168290, 336580, 1026569, 2053138, 4106276, 5132845, 10265690, 20531380]

約数ペア:

[(1, 20531380), (2, 10265690), (4, 5132845), (5, 4106276), (10, 2053138), (20, 1026569), (61, 336580), (122, 168290), (244, 84145), (305, 67316), (610, 33658), (1220, 16829)]