17961980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{10091}}^1$

素因数の和:10189

約数の個数: 24

約数和(自身を含む): 38147760

約数和(自身を除く): 20185780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 10091, 20182, 40364, 50455, 100910, 201820, 898099, 1796198, 3592396, 4490495, 8980990, 17961980]

約数ペア:

[(1, 17961980), (2, 8980990), (4, 4490495), (5, 3592396), (10, 1796198), (20, 898099), (89, 201820), (178, 100910), (356, 50455), (445, 40364), (890, 20182), (1780, 10091)]