21068180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{61}}^1\times {\mathrm{2467}}^1$

素因数の和:2544

約数の個数: 48

約数和(自身を含む): 51413376

約数和(自身を除く): 30345196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 61, 70, 122, 140, 244, 305, 427, 610, 854, 1220, 1708, 2135, 2467, 4270, 4934, 8540, 9868, 12335, 17269, 24670, 34538, 49340, 69076, 86345, 150487, 172690, 300974, 345380, 601948, 752435, 1053409, 1504870, 2106818, 3009740, 4213636, 5267045, 10534090, 21068180]

約数ペア:

[(1, 21068180), (2, 10534090), (4, 5267045), (5, 4213636), (7, 3009740), (10, 2106818), (14, 1504870), (20, 1053409), (28, 752435), (35, 601948), (61, 345380), (70, 300974), (122, 172690), (140, 150487), (244, 86345), (305, 69076), (427, 49340), (610, 34538), (854, 24670), (1220, 17269), (1708, 12335), (2135, 9868), (2467, 8540), (4270, 4934)]