17999960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3719}}^1$

素因数の和:3752

約数の個数: 48

約数和(自身を含む): 44528400

約数和(自身を除く): 26528440

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 121, 220, 242, 440, 484, 605, 968, 1210, 2420, 3719, 4840, 7438, 14876, 18595, 29752, 37190, 40909, 74380, 81818, 148760, 163636, 204545, 327272, 409090, 449999, 818180, 899998, 1636360, 1799996, 2249995, 3599992, 4499990, 8999980, 17999960]

約数ペア:

[(1, 17999960), (2, 8999980), (4, 4499990), (5, 3599992), (8, 2249995), (10, 1799996), (11, 1636360), (20, 899998), (22, 818180), (40, 449999), (44, 409090), (55, 327272), (88, 204545), (110, 163636), (121, 148760), (220, 81818), (242, 74380), (440, 40909), (484, 37190), (605, 29752), (968, 18595), (1210, 14876), (2420, 7438), (3719, 4840)]