18805820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{409}}^1$

素因数の和:459

約数の個数: 72

約数和(自身を含む): 45805200

約数和(自身を除く): 26999380

約数列:

[1, 2, 4, 5, 10, 11, 19, 20, 22, 38, 44, 55, 76, 95, 110, 121, 190, 209, 220, 242, 380, 409, 418, 484, 605, 818, 836, 1045, 1210, 1636, 2045, 2090, 2299, 2420, 4090, 4180, 4499, 4598, 7771, 8180, 8998, 9196, 11495, 15542, 17996, 22495, 22990, 31084, 38855, 44990, 45980, 49489, 77710, 85481, 89980, 98978, 155420, 170962, 197956, 247445, 341924, 427405, 494890, 854810, 940291, 989780, 1709620, 1880582, 3761164, 4701455, 9402910, 18805820]

約数ペア:

[(1, 18805820), (2, 9402910), (4, 4701455), (5, 3761164), (10, 1880582), (11, 1709620), (19, 989780), (20, 940291), (22, 854810), (38, 494890), (44, 427405), (55, 341924), (76, 247445), (95, 197956), (110, 170962), (121, 155420), (190, 98978), (209, 89980), (220, 85481), (242, 77710), (380, 49489), (409, 45980), (418, 44990), (484, 38855), (605, 31084), (818, 22990), (836, 22495), (1045, 17996), (1210, 15542), (1636, 11495), (2045, 9196), (2090, 8998), (2299, 8180), (2420, 7771), (4090, 4598), (4180, 4499)]