18892880

素因数分解:

$2^4\times 5^1\times {\mathrm{139}}^1\times {\mathrm{1699}}^1$

素因数の和:1851

約数の個数: 40

約数和(自身を含む): 44268000

約数和(自身を除く): 25375120

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 139, 278, 556, 695, 1112, 1390, 1699, 2224, 2780, 3398, 5560, 6796, 8495, 11120, 13592, 16990, 27184, 33980, 67960, 135920, 236161, 472322, 944644, 1180805, 1889288, 2361610, 3778576, 4723220, 9446440, 18892880]

約数ペア:

[(1, 18892880), (2, 9446440), (4, 4723220), (5, 3778576), (8, 2361610), (10, 1889288), (16, 1180805), (20, 944644), (40, 472322), (80, 236161), (139, 135920), (278, 67960), (556, 33980), (695, 27184), (1112, 16990), (1390, 13592), (1699, 11120), (2224, 8495), (2780, 6796), (3398, 5560)]