20467880

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{7207}}^1$

素因数の和:7289

約数の個数: 32

約数和(自身を含む): 46707840

約数和(自身を除く): 26239960

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 7207, 14414, 28828, 36035, 57656, 72070, 144140, 288280, 511697, 1023394, 2046788, 2558485, 4093576, 5116970, 10233940, 20467880]

約数ペア:

[(1, 20467880), (2, 10233940), (4, 5116970), (5, 4093576), (8, 2558485), (10, 2046788), (20, 1023394), (40, 511697), (71, 288280), (142, 144140), (284, 72070), (355, 57656), (568, 36035), (710, 28828), (1420, 14414), (2840, 7207)]