21675195

素因数分解:

$3^4\times 5^1\times {\mathrm{109}}^1\times {\mathrm{491}}^1$

素因数の和:617

約数の個数: 40

約数和(自身を含む): 39291120

約数和(自身を除く): 17615925

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 109, 135, 327, 405, 491, 545, 981, 1473, 1635, 2455, 2943, 4419, 4905, 7365, 8829, 13257, 14715, 22095, 39771, 44145, 53519, 66285, 160557, 198855, 267595, 481671, 802785, 1445013, 2408355, 4335039, 7225065, 21675195]

約数ペア:

[(1, 21675195), (3, 7225065), (5, 4335039), (9, 2408355), (15, 1445013), (27, 802785), (45, 481671), (81, 267595), (109, 198855), (135, 160557), (327, 66285), (405, 53519), (491, 44145), (545, 39771), (981, 22095), (1473, 14715), (1635, 13257), (2455, 8829), (2943, 7365), (4419, 4905)]