16181980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{9091}}^1$

素因数の和:9189

約数の個数: 24

約数和(自身を含む): 34367760

約数和(自身を除く): 18185780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 356, 445, 890, 1780, 9091, 18182, 36364, 45455, 90910, 181820, 809099, 1618198, 3236396, 4045495, 8090990, 16181980]

約数ペア:

[(1, 16181980), (2, 8090990), (4, 4045495), (5, 3236396), (10, 1618198), (20, 809099), (89, 181820), (178, 90910), (356, 45455), (445, 36364), (890, 18182), (1780, 9091)]