21063525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{53}}^1\times {\mathrm{757}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 40604544

約数和(自身を除く): 19541019

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 53, 75, 105, 159, 175, 265, 371, 525, 757, 795, 1113, 1325, 1855, 2271, 3785, 3975, 5299, 5565, 9275, 11355, 15897, 18925, 26495, 27825, 40121, 56775, 79485, 120363, 132475, 200605, 280847, 397425, 601815, 842541, 1003025, 1404235, 3009075, 4212705, 7021175, 21063525]

約数ペア:

[(1, 21063525), (3, 7021175), (5, 4212705), (7, 3009075), (15, 1404235), (21, 1003025), (25, 842541), (35, 601815), (53, 397425), (75, 280847), (105, 200605), (159, 132475), (175, 120363), (265, 79485), (371, 56775), (525, 40121), (757, 27825), (795, 26495), (1113, 18925), (1325, 15897), (1855, 11355), (2271, 9275), (3785, 5565), (3975, 5299)]