20815165

素因数分解:

$5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{113}}^1\times {\mathrm{277}}^1$

素因数の和:421

約数の個数: 32

約数和(自身を含む): 30424320

約数和(自身を除く): 9609155

約数列:

[1, 5, 7, 19, 35, 95, 113, 133, 277, 565, 665, 791, 1385, 1939, 2147, 3955, 5263, 9695, 10735, 15029, 26315, 31301, 36841, 75145, 156505, 184205, 219107, 594719, 1095535, 2973595, 4163033, 20815165]

約数ペア:

[(1, 20815165), (5, 4163033), (7, 2973595), (19, 1095535), (35, 594719), (95, 219107), (113, 184205), (133, 156505), (277, 75145), (565, 36841), (665, 31301), (791, 26315), (1385, 15029), (1939, 10735), (2147, 9695), (3955, 5263)]