638996920

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{141371}}^1$

素因数の和:141495

約数の個数: 32

約数和(自身を含む): 1450476720

約数和(自身を除く): 811479800

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4520, 141371, 282742, 565484, 706855, 1130968, 1413710, 2827420, 5654840, 15974923, 31949846, 63899692, 79874615, 127799384, 159749230, 319498460, 638996920]

約数ペア:

[(1, 638996920), (2, 319498460), (4, 159749230), (5, 127799384), (8, 79874615), (10, 63899692), (20, 31949846), (40, 15974923), (113, 5654840), (226, 2827420), (452, 1413710), (565, 1130968), (904, 706855), (1130, 565484), (2260, 282742), (4520, 141371)]