91201990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{8209}}^1$

素因数の和:8328

約数の個数: 32

約数和(自身を含む): 180882720

約数和(自身を除く): 89680730

約数列:

[1, 2, 5, 10, 11, 22, 55, 101, 110, 202, 505, 1010, 1111, 2222, 5555, 8209, 11110, 16418, 41045, 82090, 90299, 180598, 451495, 829109, 902990, 1658218, 4145545, 8291090, 9120199, 18240398, 45600995, 91201990]

約数ペア:

[(1, 91201990), (2, 45600995), (5, 18240398), (10, 9120199), (11, 8291090), (22, 4145545), (55, 1658218), (101, 902990), (110, 829109), (202, 451495), (505, 180598), (1010, 90299), (1111, 82090), (2222, 41045), (5555, 16418), (8209, 11110)]