21480705

素因数分解:

$3^2\times 5^1\times {\mathrm{557}}^1\times {\mathrm{857}}^1$

素因数の和:1425

約数の個数: 24

約数和(自身を含む): 37343592

約数和(自身を除く): 15862887

約数列:

[1, 3, 5, 9, 15, 45, 557, 857, 1671, 2571, 2785, 4285, 5013, 7713, 8355, 12855, 25065, 38565, 477349, 1432047, 2386745, 4296141, 7160235, 21480705]

約数ペア:

[(1, 21480705), (3, 7160235), (5, 4296141), (9, 2386745), (15, 1432047), (45, 477349), (557, 38565), (857, 25065), (1671, 12855), (2571, 8355), (2785, 7713), (4285, 5013)]