21512212

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{181}}^1\times {\mathrm{691}}^1$

素因数の和:919

約数の個数: 24

約数和(自身を含む): 38790752

約数和(自身を除く): 17278540

約数列:

[1, 2, 4, 43, 86, 172, 181, 362, 691, 724, 1382, 2764, 7783, 15566, 29713, 31132, 59426, 118852, 125071, 250142, 500284, 5378053, 10756106, 21512212]

約数ペア:

[(1, 21512212), (2, 10756106), (4, 5378053), (43, 500284), (86, 250142), (172, 125071), (181, 118852), (362, 59426), (691, 31132), (724, 29713), (1382, 15566), (2764, 7783)]