21771140

素因数分解:

$2^2\times 5^1\times {\mathrm{263}}^1\times {\mathrm{4139}}^1$

素因数の和:4411

約数の個数: 24

約数和(自身を含む): 45904320

約数和(自身を除く): 24133180

約数列:

[1, 2, 4, 5, 10, 20, 263, 526, 1052, 1315, 2630, 4139, 5260, 8278, 16556, 20695, 41390, 82780, 1088557, 2177114, 4354228, 5442785, 10885570, 21771140]

約数ペア:

[(1, 21771140), (2, 10885570), (4, 5442785), (5, 4354228), (10, 2177114), (20, 1088557), (263, 82780), (526, 41390), (1052, 20695), (1315, 16556), (2630, 8278), (4139, 5260)]