31387460

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{120721}}^1$

素因数の和:120743

約数の個数: 24

約数和(自身を含む): 70984536

約数和(自身を除く): 39597076

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 120721, 241442, 482884, 603605, 1207210, 1569373, 2414420, 3138746, 6277492, 7846865, 15693730, 31387460]

約数ペア:

[(1, 31387460), (2, 15693730), (4, 7846865), (5, 6277492), (10, 3138746), (13, 2414420), (20, 1569373), (26, 1207210), (52, 603605), (65, 482884), (130, 241442), (260, 120721)]