18388215

素因数分解:

$3^4\times 5^1\times {\mathrm{45403}}^1$

素因数の和:45420

約数の個数: 20

約数和(自身を含む): 32963304

約数和(自身を除く): 14575089

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 45403, 136209, 227015, 408627, 681045, 1225881, 2043135, 3677643, 6129405, 18388215]

約数ペア:

[(1, 18388215), (3, 6129405), (5, 3677643), (9, 2043135), (15, 1225881), (27, 681045), (45, 408627), (81, 227015), (135, 136209), (405, 45403)]