21328605

素因数分解:

$3^2\times 5^1\times {\mathrm{149}}^1\times {\mathrm{3181}}^1$

素因数の和:3341

約数の個数: 24

約数和(自身を含む): 37229400

約数和(自身を除く): 15900795

約数列:

[1, 3, 5, 9, 15, 45, 149, 447, 745, 1341, 2235, 3181, 6705, 9543, 15905, 28629, 47715, 143145, 473969, 1421907, 2369845, 4265721, 7109535, 21328605]

約数ペア:

[(1, 21328605), (3, 7109535), (5, 4265721), (9, 2369845), (15, 1421907), (45, 473969), (149, 143145), (447, 47715), (745, 28629), (1341, 15905), (2235, 9543), (3181, 6705)]