18391990

素因数分解:

$2^1\times 5^1\times {\mathrm{31}}^1\times {\mathrm{79}}^1\times {\mathrm{751}}^1$

素因数の和:868

約数の個数: 32

約数和(自身を含む): 34652160

約数和(自身を除く): 16260170

約数列:

[1, 2, 5, 10, 31, 62, 79, 155, 158, 310, 395, 751, 790, 1502, 2449, 3755, 4898, 7510, 12245, 23281, 24490, 46562, 59329, 116405, 118658, 232810, 296645, 593290, 1839199, 3678398, 9195995, 18391990]

約数ペア:

[(1, 18391990), (2, 9195995), (5, 3678398), (10, 1839199), (31, 593290), (62, 296645), (79, 232810), (155, 118658), (158, 116405), (310, 59329), (395, 46562), (751, 24490), (790, 23281), (1502, 12245), (2449, 7510), (3755, 4898)]