20961585

素因数分解:

$3^4\times 5^1\times {\mathrm{73}}^1\times {\mathrm{709}}^1$

素因数の和:799

約数の個数: 40

約数和(自身を含む): 38144040

約数和(自身を除く): 17182455

約数列:

[1, 3, 5, 9, 15, 27, 45, 73, 81, 135, 219, 365, 405, 657, 709, 1095, 1971, 2127, 3285, 3545, 5913, 6381, 9855, 10635, 19143, 29565, 31905, 51757, 57429, 95715, 155271, 258785, 287145, 465813, 776355, 1397439, 2329065, 4192317, 6987195, 20961585]

約数ペア:

[(1, 20961585), (3, 6987195), (5, 4192317), (9, 2329065), (15, 1397439), (27, 776355), (45, 465813), (73, 287145), (81, 258785), (135, 155271), (219, 95715), (365, 57429), (405, 51757), (657, 31905), (709, 29565), (1095, 19143), (1971, 10635), (2127, 9855), (3285, 6381), (3545, 5913)]