21821050

素因数分解:

$2^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{101}}^1\times {\mathrm{149}}^1$

素因数の和:291

約数の個数: 48

約数和(自身を含む): 42687000

約数和(自身を除く): 20865950

約数列:

[1, 2, 5, 10, 25, 29, 50, 58, 101, 145, 149, 202, 290, 298, 505, 725, 745, 1010, 1450, 1490, 2525, 2929, 3725, 4321, 5050, 5858, 7450, 8642, 14645, 15049, 21605, 29290, 30098, 43210, 73225, 75245, 108025, 146450, 150490, 216050, 376225, 436421, 752450, 872842, 2182105, 4364210, 10910525, 21821050]

約数ペア:

[(1, 21821050), (2, 10910525), (5, 4364210), (10, 2182105), (25, 872842), (29, 752450), (50, 436421), (58, 376225), (101, 216050), (145, 150490), (149, 146450), (202, 108025), (290, 75245), (298, 73225), (505, 43210), (725, 30098), (745, 29290), (1010, 21605), (1450, 15049), (1490, 14645), (2525, 8642), (2929, 7450), (3725, 5858), (4321, 5050)]