72251980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{40591}}^1$

素因数の和:40689

約数の個数: 24

約数和(自身を含む): 153437760

約数和(自身を除く): 81185780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 40591, 81182, 162364, 202955, 405910, 811820, 3612599, 7225198, 14450396, 18062995, 36125990, 72251980]

約数ペア:

[(1, 72251980), (2, 36125990), (4, 18062995), (5, 14450396), (10, 7225198), (20, 3612599), (89, 811820), (178, 405910), (356, 202955), (445, 162364), (890, 81182), (1780, 40591)]