20451753

素因数分解:

$3^2\times 7^1\times {\mathrm{73}}^1\times {\mathrm{4447}}^1$

素因数の和:4533

約数の個数: 24

約数和(自身を含む): 34231808

約数和(自身を除く): 13780055

約数列:

[1, 3, 7, 9, 21, 63, 73, 219, 511, 657, 1533, 4447, 4599, 13341, 31129, 40023, 93387, 280161, 324631, 973893, 2272417, 2921679, 6817251, 20451753]

約数ペア:

[(1, 20451753), (3, 6817251), (7, 2921679), (9, 2272417), (21, 973893), (63, 324631), (73, 280161), (219, 93387), (511, 40023), (657, 31129), (1533, 13341), (4447, 4599)]