21009512

素因数分解:

$2^3\times {\mathrm{409}}^1\times {\mathrm{6421}}^1$

素因数の和:6836

約数の個数: 16

約数和(自身を含む): 39495300

約数和(自身を除く): 18485788

約数列:

[1, 2, 4, 8, 409, 818, 1636, 3272, 6421, 12842, 25684, 51368, 2626189, 5252378, 10504756, 21009512]

約数ペア:

[(1, 21009512), (2, 10504756), (4, 5252378), (8, 2626189), (409, 51368), (818, 25684), (1636, 12842), (3272, 6421)]