21256575

素因数分解:

$3^1\times 5^2\times {\mathrm{139}}^1\times {\mathrm{2039}}^1$

素因数の和:2191

約数の個数: 24

約数和(自身を含む): 35414400

約数和(自身を除く): 14157825

約数列:

[1, 3, 5, 15, 25, 75, 139, 417, 695, 2039, 2085, 3475, 6117, 10195, 10425, 30585, 50975, 152925, 283421, 850263, 1417105, 4251315, 7085525, 21256575]

約数ペア:

[(1, 21256575), (3, 7085525), (5, 4251315), (15, 1417105), (25, 850263), (75, 283421), (139, 152925), (417, 50975), (695, 30585), (2039, 10425), (2085, 10195), (3475, 6117)]