20671640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{4271}}^1$

素因数の和:4304

約数の個数: 48

約数和(自身を含む): 51135840

約数和(自身を除く): 30464200

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, 4271, 4840, 8542, 17084, 21355, 34168, 42710, 46981, 85420, 93962, 170840, 187924, 234905, 375848, 469810, 516791, 939620, 1033582, 1879240, 2067164, 2583955, 4134328, 5167910, 10335820, 20671640]

約数ペア:

[(1, 20671640), (2, 10335820), (4, 5167910), (5, 4134328), (8, 2583955), (10, 2067164), (11, 1879240), (20, 1033582), (22, 939620), (40, 516791), (44, 469810), (55, 375848), (88, 234905), (110, 187924), (121, 170840), (220, 93962), (242, 85420), (440, 46981), (484, 42710), (605, 34168), (968, 21355), (1210, 17084), (2420, 8542), (4271, 4840)]