20078890

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{109}}^2$

素因数の和:251

約数の個数: 36

約数和(自身を含む): 39498354

約数和(自身を除く): 19419464

約数列:

[1, 2, 5, 10, 13, 26, 65, 109, 130, 169, 218, 338, 545, 845, 1090, 1417, 1690, 2834, 7085, 11881, 14170, 18421, 23762, 36842, 59405, 92105, 118810, 154453, 184210, 308906, 772265, 1544530, 2007889, 4015778, 10039445, 20078890]

約数ペア:

[(1, 20078890), (2, 10039445), (5, 4015778), (10, 2007889), (13, 1544530), (26, 772265), (65, 308906), (109, 184210), (130, 154453), (169, 118810), (218, 92105), (338, 59405), (545, 36842), (845, 23762), (1090, 18421), (1417, 14170), (1690, 11881), (2834, 7085)]