21212775

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3251}}^1$

素因数の和:3296

約数の個数: 36

約数和(自身を含む): 39316680

約数和(自身を除く): 18103905

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3251, 6525, 9753, 16255, 29259, 48765, 81275, 94279, 146295, 243825, 282837, 471395, 731475, 848511, 1414185, 2356975, 4242555, 7070925, 21212775]

約数ペア:

[(1, 21212775), (3, 7070925), (5, 4242555), (9, 2356975), (15, 1414185), (25, 848511), (29, 731475), (45, 471395), (75, 282837), (87, 243825), (145, 146295), (225, 94279), (261, 81275), (435, 48765), (725, 29259), (1305, 16255), (2175, 9753), (3251, 6525)]