21120615

素因数分解:

$3^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{1549}}^1$

素因数の和:1664

約数の個数: 32

約数和(自身を含む): 37944000

約数和(自身を除く): 16823385

約数列:

[1, 3, 5, 9, 15, 27, 45, 101, 135, 303, 505, 909, 1515, 1549, 2727, 4545, 4647, 7745, 13635, 13941, 23235, 41823, 69705, 156449, 209115, 469347, 782245, 1408041, 2346735, 4224123, 7040205, 21120615]

約数ペア:

[(1, 21120615), (3, 7040205), (5, 4224123), (9, 2346735), (15, 1408041), (27, 782245), (45, 469347), (101, 209115), (135, 156449), (303, 69705), (505, 41823), (909, 23235), (1515, 13941), (1549, 13635), (2727, 7745), (4545, 4647)]