80909900

素因数分解:

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

素因数の和:9194

約数の個数: 36

約数和(自身を含む): 177566760

約数和(自身を除く): 96656860

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 89, 100, 178, 356, 445, 890, 1780, 2225, 4450, 8900, 9091, 18182, 36364, 45455, 90910, 181820, 227275, 454550, 809099, 909100, 1618198, 3236396, 4045495, 8090990, 16181980, 20227475, 40454950, 80909900]

約数ペア:

[(1, 80909900), (2, 40454950), (4, 20227475), (5, 16181980), (10, 8090990), (20, 4045495), (25, 3236396), (50, 1618198), (89, 909100), (100, 809099), (178, 454550), (356, 227275), (445, 181820), (890, 90910), (1780, 45455), (2225, 36364), (4450, 18182), (8900, 9091)]