18787790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{239}}^1\times {\mathrm{1123}}^1$

素因数の和:1376

約数の個数: 32

約数和(自身を含む): 38845440

約数和(自身を除く): 20057650

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 239, 478, 1123, 1195, 1673, 2246, 2390, 3346, 5615, 7861, 8365, 11230, 15722, 16730, 39305, 78610, 268397, 536794, 1341985, 1878779, 2683970, 3757558, 9393895, 18787790]

約数ペア:

[(1, 18787790), (2, 9393895), (5, 3757558), (7, 2683970), (10, 1878779), (14, 1341985), (35, 536794), (70, 268397), (239, 78610), (478, 39305), (1123, 16730), (1195, 15722), (1673, 11230), (2246, 8365), (2390, 7861), (3346, 5615)]