18133750

素因数分解:

$2^1\times 5^4\times {\mathrm{89}}^1\times {\mathrm{163}}^1$

素因数の和:274

約数の個数: 40

約数和(自身を含む): 34582680

約数和(自身を除く): 16448930

約数列:

[1, 2, 5, 10, 25, 50, 89, 125, 163, 178, 250, 326, 445, 625, 815, 890, 1250, 1630, 2225, 4075, 4450, 8150, 11125, 14507, 20375, 22250, 29014, 40750, 55625, 72535, 101875, 111250, 145070, 203750, 362675, 725350, 1813375, 3626750, 9066875, 18133750]

約数ペア:

[(1, 18133750), (2, 9066875), (5, 3626750), (10, 1813375), (25, 725350), (50, 362675), (89, 203750), (125, 145070), (163, 111250), (178, 101875), (250, 72535), (326, 55625), (445, 40750), (625, 29014), (815, 22250), (890, 20375), (1250, 14507), (1630, 11125), (2225, 8150), (4075, 4450)]