21271245

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19973}}^1$

素因数の和:20052

約数の個数: 16

約数和(自身を含む): 34515072

約数和(自身を除く): 13243827

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19973, 59919, 99865, 299595, 1418083, 4254249, 7090415, 21271245]

約数ペア:

[(1, 21271245), (3, 7090415), (5, 4254249), (15, 1418083), (71, 299595), (213, 99865), (355, 59919), (1065, 19973)]