21221475

素因数分解:

$3^1\times 5^2\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{887}}^1$

素因数の和:940

約数の個数: 48

約数和(自身を含む): 39640320

約数和(自身を除く): 18418845

約数列:

[1, 3, 5, 11, 15, 25, 29, 33, 55, 75, 87, 145, 165, 275, 319, 435, 725, 825, 887, 957, 1595, 2175, 2661, 4435, 4785, 7975, 9757, 13305, 22175, 23925, 25723, 29271, 48785, 66525, 77169, 128615, 146355, 243925, 282953, 385845, 643075, 731775, 848859, 1414765, 1929225, 4244295, 7073825, 21221475]

約数ペア:

[(1, 21221475), (3, 7073825), (5, 4244295), (11, 1929225), (15, 1414765), (25, 848859), (29, 731775), (33, 643075), (55, 385845), (75, 282953), (87, 243925), (145, 146355), (165, 128615), (275, 77169), (319, 66525), (435, 48785), (725, 29271), (825, 25723), (887, 23925), (957, 22175), (1595, 13305), (2175, 9757), (2661, 7975), (4435, 4785)]