18708280

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4139}}^1$

素因数の和:4263

約数の個数: 32

約数和(自身を含む): 42476400

約数和(自身を除く): 23768120

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4139, 4520, 8278, 16556, 20695, 33112, 41390, 82780, 165560, 467707, 935414, 1870828, 2338535, 3741656, 4677070, 9354140, 18708280]

約数ペア:

[(1, 18708280), (2, 9354140), (4, 4677070), (5, 3741656), (8, 2338535), (10, 1870828), (20, 935414), (40, 467707), (113, 165560), (226, 82780), (452, 41390), (565, 33112), (904, 20695), (1130, 16556), (2260, 8278), (4139, 4520)]