8999980

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3719}}^1$

素因数の和:3750

約数の個数: 36

約数和(自身を含む): 20779920

約数和(自身を除く): 11779940

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 121, 220, 242, 484, 605, 1210, 2420, 3719, 7438, 14876, 18595, 37190, 40909, 74380, 81818, 163636, 204545, 409090, 449999, 818180, 899998, 1799996, 2249995, 4499990, 8999980]

約数ペア:

[(1, 8999980), (2, 4499990), (4, 2249995), (5, 1799996), (10, 899998), (11, 818180), (20, 449999), (22, 409090), (44, 204545), (55, 163636), (110, 81818), (121, 74380), (220, 40909), (242, 37190), (484, 18595), (605, 14876), (1210, 7438), (2420, 3719)]