21529756

素因数分解:

$2^2\times {\mathrm{41}}^1\times {\mathrm{43}}^2\times {\mathrm{71}}^1$

素因数の和:202

約数の個数: 36

約数和(自身を含む): 40071024

約数和(自身を除く): 18541268

約数列:

[1, 2, 4, 41, 43, 71, 82, 86, 142, 164, 172, 284, 1763, 1849, 2911, 3053, 3526, 3698, 5822, 6106, 7052, 7396, 11644, 12212, 75809, 125173, 131279, 151618, 250346, 262558, 303236, 500692, 525116, 5382439, 10764878, 21529756]

約数ペア:

[(1, 21529756), (2, 10764878), (4, 5382439), (41, 525116), (43, 500692), (71, 303236), (82, 262558), (86, 250346), (142, 151618), (164, 131279), (172, 125173), (284, 75809), (1763, 12212), (1849, 11644), (2911, 7396), (3053, 7052), (3526, 6106), (3698, 5822)]