21490556

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{191}}^1\times {\mathrm{1223}}^1$

素因数の和:1441

約数の個数: 24

約数和(自身を含む): 39481344

約数和(自身を除く): 17990788

約数列:

[1, 2, 4, 23, 46, 92, 191, 382, 764, 1223, 2446, 4393, 4892, 8786, 17572, 28129, 56258, 112516, 233593, 467186, 934372, 5372639, 10745278, 21490556]

約数ペア:

[(1, 21490556), (2, 10745278), (4, 5372639), (23, 934372), (46, 467186), (92, 233593), (191, 112516), (382, 56258), (764, 28129), (1223, 17572), (2446, 8786), (4393, 4892)]