21371085

素因数分解:

$3^2\times 5^1\times {\mathrm{109}}^1\times {\mathrm{4357}}^1$

素因数の和:4477

約数の個数: 24

約数和(自身を含む): 37391640

約数和(自身を除く): 16020555

約数列:

[1, 3, 5, 9, 15, 45, 109, 327, 545, 981, 1635, 4357, 4905, 13071, 21785, 39213, 65355, 196065, 474913, 1424739, 2374565, 4274217, 7123695, 21371085]

約数ペア:

[(1, 21371085), (3, 7123695), (5, 4274217), (9, 2374565), (15, 1424739), (45, 474913), (109, 196065), (327, 65355), (545, 39213), (981, 21785), (1635, 13071), (4357, 4905)]