18967960

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{3919}}^1$

素因数の和:3952

約数の個数: 48

約数和(自身を含む): 46922400

約数和(自身を除く): 27954440

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, 3919, 4840, 7838, 15676, 19595, 31352, 39190, 43109, 78380, 86218, 156760, 172436, 215545, 344872, 431090, 474199, 862180, 948398, 1724360, 1896796, 2370995, 3793592, 4741990, 9483980, 18967960]

約数ペア:

[(1, 18967960), (2, 9483980), (4, 4741990), (5, 3793592), (8, 2370995), (10, 1896796), (11, 1724360), (20, 948398), (22, 862180), (40, 474199), (44, 431090), (55, 344872), (88, 215545), (110, 172436), (121, 156760), (220, 86218), (242, 78380), (440, 43109), (484, 39190), (605, 31352), (968, 19595), (1210, 15676), (2420, 7838), (3919, 4840)]