640644

素因数分解:

$2^2\times 3^1\times {\mathrm{197}}^1\times {\mathrm{271}}^1$

素因数の和:475

約数の個数: 24

約数和(自身を含む): 1507968

約数和(自身を除く): 867324

約数列:

[1, 2, 3, 4, 6, 12, 197, 271, 394, 542, 591, 788, 813, 1084, 1182, 1626, 2364, 3252, 53387, 106774, 160161, 213548, 320322, 640644]

約数ペア:

[(1, 640644), (2, 320322), (3, 213548), (4, 160161), (6, 106774), (12, 53387), (197, 3252), (271, 2364), (394, 1626), (542, 1182), (591, 1084), (788, 813)]