28282780

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{3359}}^1$

素因数の和:3789

約数の個数: 24

約数和(自身を含む): 59552640

約数和(自身を除く): 31269860

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 3359, 4210, 6718, 8420, 13436, 16795, 33590, 67180, 1414139, 2828278, 5656556, 7070695, 14141390, 28282780]

約数ペア:

[(1, 28282780), (2, 14141390), (4, 7070695), (5, 5656556), (10, 2828278), (20, 1414139), (421, 67180), (842, 33590), (1684, 16795), (2105, 13436), (3359, 8420), (4210, 6718)]