28719620

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{3581}}^1$

素因数の和:3991

約数の個数: 24

約数和(自身を含む): 60478488

約数和(自身を除く): 31758868

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 3581, 4010, 7162, 8020, 14324, 17905, 35810, 71620, 1435981, 2871962, 5743924, 7179905, 14359810, 28719620]

約数ペア:

[(1, 28719620), (2, 14359810), (4, 7179905), (5, 5743924), (10, 2871962), (20, 1435981), (401, 71620), (802, 35810), (1604, 17905), (2005, 14324), (3581, 8020), (4010, 7162)]