18671660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{677}}^1$

素因数の和:890

約数の個数: 48

約数和(自身を含む): 45105984

約数和(自身を除く): 26434324

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 197, 394, 677, 788, 985, 1354, 1379, 1970, 2708, 2758, 3385, 3940, 4739, 5516, 6770, 6895, 9478, 13540, 13790, 18956, 23695, 27580, 47390, 94780, 133369, 266738, 533476, 666845, 933583, 1333690, 1867166, 2667380, 3734332, 4667915, 9335830, 18671660]

約数ペア:

[(1, 18671660), (2, 9335830), (4, 4667915), (5, 3734332), (7, 2667380), (10, 1867166), (14, 1333690), (20, 933583), (28, 666845), (35, 533476), (70, 266738), (140, 133369), (197, 94780), (394, 47390), (677, 27580), (788, 23695), (985, 18956), (1354, 13790), (1379, 13540), (1970, 9478), (2708, 6895), (2758, 6770), (3385, 5516), (3940, 4739)]