21140818

素因数分解:

$2^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{6473}}^1$

素因数の和:6569

約数の個数: 16

約数和(自身を含む): 33561216

約数和(自身を除く): 12420398

約数列:

[1, 2, 23, 46, 71, 142, 1633, 3266, 6473, 12946, 148879, 297758, 459583, 919166, 10570409, 21140818]

約数ペア:

[(1, 21140818), (2, 10570409), (23, 919166), (46, 459583), (71, 297758), (142, 148879), (1633, 12946), (3266, 6473)]