21279485

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{47}}^1\times {\mathrm{127}}^1$

素因数の和:233

約数の個数: 32

約数和(自身を含む): 28311552

約数和(自身を除く): 7032067

約数列:

[1, 5, 23, 31, 47, 115, 127, 155, 235, 635, 713, 1081, 1457, 2921, 3565, 3937, 5405, 5969, 7285, 14605, 19685, 29845, 33511, 90551, 137287, 167555, 185039, 452755, 686435, 925195, 4255897, 21279485]

約数ペア:

[(1, 21279485), (5, 4255897), (23, 925195), (31, 686435), (47, 452755), (115, 185039), (127, 167555), (155, 137287), (235, 90551), (635, 33511), (713, 29845), (1081, 19685), (1457, 14605), (2921, 7285), (3565, 5969), (3937, 5405)]