21271845

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{701}}^1$

素因数の和:750

約数の個数: 48

約数和(自身を含む): 41378688

約数和(自身を除く): 20106843

約数列:

[1, 3, 5, 7, 15, 17, 21, 35, 51, 85, 105, 119, 255, 289, 357, 595, 701, 867, 1445, 1785, 2023, 2103, 3505, 4335, 4907, 6069, 10115, 10515, 11917, 14721, 24535, 30345, 35751, 59585, 73605, 83419, 178755, 202589, 250257, 417095, 607767, 1012945, 1251285, 1418123, 3038835, 4254369, 7090615, 21271845]

約数ペア:

[(1, 21271845), (3, 7090615), (5, 4254369), (7, 3038835), (15, 1418123), (17, 1251285), (21, 1012945), (35, 607767), (51, 417095), (85, 250257), (105, 202589), (119, 178755), (255, 83419), (289, 73605), (357, 59585), (595, 35751), (701, 30345), (867, 24535), (1445, 14721), (1785, 11917), (2023, 10515), (2103, 10115), (3505, 6069), (4335, 4907)]