21051620

素因数分解:

$2^2\times 5^1\times {\mathrm{19}}^1\times {\mathrm{55399}}^1$

素因数の和:55427

約数の個数: 24

約数和(自身を含む): 46536000

約数和(自身を除く): 25484380

約数列:

[1, 2, 4, 5, 10, 19, 20, 38, 76, 95, 190, 380, 55399, 110798, 221596, 276995, 553990, 1052581, 1107980, 2105162, 4210324, 5262905, 10525810, 21051620]

約数ペア:

[(1, 21051620), (2, 10525810), (4, 5262905), (5, 4210324), (10, 2105162), (19, 1107980), (20, 1052581), (38, 553990), (76, 276995), (95, 221596), (190, 110798), (380, 55399)]