18257915

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:120

約数の個数: 48

約数和(自身を含む): 26562816

約数和(自身を除く): 8304901

約数列:

[1, 5, 13, 17, 31, 41, 65, 85, 155, 169, 205, 221, 403, 527, 533, 697, 845, 1105, 1271, 2015, 2635, 2665, 2873, 3485, 5239, 6355, 6851, 6929, 9061, 14365, 16523, 21607, 26195, 34255, 34645, 45305, 82615, 89063, 108035, 117793, 214799, 280891, 445315, 588965, 1073995, 1404455, 3651583, 18257915]

約数ペア:

[(1, 18257915), (5, 3651583), (13, 1404455), (17, 1073995), (31, 588965), (41, 445315), (65, 280891), (85, 214799), (155, 117793), (169, 108035), (205, 89063), (221, 82615), (403, 45305), (527, 34645), (533, 34255), (697, 26195), (845, 21607), (1105, 16523), (1271, 14365), (2015, 9061), (2635, 6929), (2665, 6851), (2873, 6355), (3485, 5239)]