21498615

素因数分解:

$3^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{487}}^1$

素因数の和:613

約数の個数: 40

約数和(自身を含む): 38971680

約数和(自身を除く): 17473065

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 109, 135, 327, 405, 487, 545, 981, 1461, 1635, 2435, 2943, 4383, 4905, 7305, 8829, 13149, 14715, 21915, 39447, 44145, 53083, 65745, 159249, 197235, 265415, 477747, 796245, 1433241, 2388735, 4299723, 7166205, 21498615]

約数ペア:

[(1, 21498615), (3, 7166205), (5, 4299723), (9, 2388735), (15, 1433241), (27, 796245), (45, 477747), (81, 265415), (109, 197235), (135, 159249), (327, 65745), (405, 53083), (487, 44145), (545, 39447), (981, 21915), (1461, 14715), (1635, 13149), (2435, 8829), (2943, 7305), (4383, 4905)]