21356668

素因数分解:

$2^2\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{769}}^1$

素因数の和:957

約数の個数: 24

約数和(自身を含む): 38419920

約数和(自身を除く): 17063252

約数列:

[1, 2, 4, 53, 106, 131, 212, 262, 524, 769, 1538, 3076, 6943, 13886, 27772, 40757, 81514, 100739, 163028, 201478, 402956, 5339167, 10678334, 21356668]

約数ペア:

[(1, 21356668), (2, 10678334), (4, 5339167), (53, 402956), (106, 201478), (131, 163028), (212, 100739), (262, 81514), (524, 40757), (769, 27772), (1538, 13886), (3076, 6943)]