21557620

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{3581}}^1$

素因数の和:3640

約数の個数: 48

約数和(自身を含む): 52956288

約数和(自身を除く): 31398668

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 70, 86, 140, 172, 215, 301, 430, 602, 860, 1204, 1505, 3010, 3581, 6020, 7162, 14324, 17905, 25067, 35810, 50134, 71620, 100268, 125335, 153983, 250670, 307966, 501340, 615932, 769915, 1077881, 1539830, 2155762, 3079660, 4311524, 5389405, 10778810, 21557620]

約数ペア:

[(1, 21557620), (2, 10778810), (4, 5389405), (5, 4311524), (7, 3079660), (10, 2155762), (14, 1539830), (20, 1077881), (28, 769915), (35, 615932), (43, 501340), (70, 307966), (86, 250670), (140, 153983), (172, 125335), (215, 100268), (301, 71620), (430, 50134), (602, 35810), (860, 25067), (1204, 17905), (1505, 14324), (3010, 7162), (3581, 6020)]