4009905

素因数分解:

$3^4\times 5^1\times {\mathrm{9901}}^1$

素因数の和:9918

約数の個数: 20

約数和(自身を含む): 7188852

約数和(自身を除く): 3178947

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 9901, 29703, 49505, 89109, 148515, 267327, 445545, 801981, 1336635, 4009905]

約数ペア:

[(1, 4009905), (3, 1336635), (5, 801981), (9, 445545), (15, 267327), (27, 148515), (45, 89109), (81, 49505), (135, 29703), (405, 9901)]