21020116

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{547}}^1\times {\mathrm{739}}^1$

素因数の和:1303

約数の個数: 24

約数和(自身を含む): 39740960

約数和(自身を除く): 18720844

約数列:

[1, 2, 4, 13, 26, 52, 547, 739, 1094, 1478, 2188, 2956, 7111, 9607, 14222, 19214, 28444, 38428, 404233, 808466, 1616932, 5255029, 10510058, 21020116]

約数ペア:

[(1, 21020116), (2, 10510058), (4, 5255029), (13, 1616932), (26, 808466), (52, 404233), (547, 38428), (739, 28444), (1094, 19214), (1478, 14222), (2188, 9607), (2956, 7111)]