21138345

素因数分解:

$3^2\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4157}}^1$

素因数の和:4281

約数の個数: 24

約数和(自身を含む): 36972936

約数和(自身を除く): 15834591

約数列:

[1, 3, 5, 9, 15, 45, 113, 339, 565, 1017, 1695, 4157, 5085, 12471, 20785, 37413, 62355, 187065, 469741, 1409223, 2348705, 4227669, 7046115, 21138345]

約数ペア:

[(1, 21138345), (3, 7046115), (5, 4227669), (9, 2348705), (15, 1409223), (45, 469741), (113, 187065), (339, 62355), (565, 37413), (1017, 20785), (1695, 12471), (4157, 5085)]