21089985

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{569}}^1$

素因数の和:937

約数の個数: 32

約数和(自身を含む): 38741760

約数和(自身を除く): 17651775

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 353, 569, 1059, 1707, 1765, 2471, 2845, 3983, 5295, 7413, 8535, 11949, 12355, 19915, 37065, 59745, 200857, 602571, 1004285, 1405999, 3012855, 4217997, 7029995, 21089985]

約数ペア:

[(1, 21089985), (3, 7029995), (5, 4217997), (7, 3012855), (15, 1405999), (21, 1004285), (35, 602571), (105, 200857), (353, 59745), (569, 37065), (1059, 19915), (1707, 12355), (1765, 11949), (2471, 8535), (2845, 7413), (3983, 5295)]