18716919

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{67}}^1$

素因数の和:144

約数の個数: 48

約数和(自身を含む): 29865600

約数和(自身を除く): 11148681

約数列:

[1, 3, 13, 19, 29, 39, 57, 67, 87, 169, 201, 247, 377, 507, 551, 741, 871, 1131, 1273, 1653, 1943, 2613, 3211, 3819, 4901, 5829, 7163, 9633, 11323, 14703, 16549, 21489, 25259, 33969, 36917, 49647, 75777, 93119, 110751, 215137, 279357, 328367, 479921, 645411, 985101, 1439763, 6238973, 18716919]

約数ペア:

[(1, 18716919), (3, 6238973), (13, 1439763), (19, 985101), (29, 645411), (39, 479921), (57, 328367), (67, 279357), (87, 215137), (169, 110751), (201, 93119), (247, 75777), (377, 49647), (507, 36917), (551, 33969), (741, 25259), (871, 21489), (1131, 16549), (1273, 14703), (1653, 11323), (1943, 9633), (2613, 7163), (3211, 5829), (3819, 4901)]