261405

素因数分解:

$3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{157}}^1$

素因数の和:205

約数の個数: 24

約数和(自身を含む): 468312

約数和(自身を除く): 206907

約数列:

[1, 3, 5, 9, 15, 37, 45, 111, 157, 185, 333, 471, 555, 785, 1413, 1665, 2355, 5809, 7065, 17427, 29045, 52281, 87135, 261405]

約数ペア:

[(1, 261405), (3, 87135), (5, 52281), (9, 29045), (15, 17427), (37, 7065), (45, 5809), (111, 2355), (157, 1665), (185, 1413), (333, 785), (471, 555)]