20783945

素因数分解:

$5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{2687}}^1$

素因数の和:2729

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 11730103

約数列:

[1, 5, 7, 13, 17, 35, 65, 85, 91, 119, 221, 455, 595, 1105, 1547, 2687, 7735, 13435, 18809, 34931, 45679, 94045, 174655, 228395, 244517, 319753, 593827, 1222585, 1598765, 2969135, 4156789, 20783945]

約数ペア:

[(1, 20783945), (5, 4156789), (7, 2969135), (13, 1598765), (17, 1222585), (35, 593827), (65, 319753), (85, 244517), (91, 228395), (119, 174655), (221, 94045), (455, 45679), (595, 34931), (1105, 18809), (1547, 13435), (2687, 7735)]