20396920

素因数分解:

$2^3\times 5^1\times {\mathrm{419}}^1\times {\mathrm{1217}}^1$

素因数の和:1647

約数の個数: 32

約数和(自身を含む): 46040400

約数和(自身を除く): 25643480

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 419, 838, 1217, 1676, 2095, 2434, 3352, 4190, 4868, 6085, 8380, 9736, 12170, 16760, 24340, 48680, 509923, 1019846, 2039692, 2549615, 4079384, 5099230, 10198460, 20396920]

約数ペア:

[(1, 20396920), (2, 10198460), (4, 5099230), (5, 4079384), (8, 2549615), (10, 2039692), (20, 1019846), (40, 509923), (419, 48680), (838, 24340), (1217, 16760), (1676, 12170), (2095, 9736), (2434, 8380), (3352, 6085), (4190, 4868)]