21021940

素因数分解:

$2^2\times 5^1\times {\mathrm{941}}^1\times {\mathrm{1117}}^1$

素因数の和:2067

約数の個数: 24

約数和(自身を含む): 44232552

約数和(自身を除く): 23210612

約数列:

[1, 2, 4, 5, 10, 20, 941, 1117, 1882, 2234, 3764, 4468, 4705, 5585, 9410, 11170, 18820, 22340, 1051097, 2102194, 4204388, 5255485, 10510970, 21021940]

約数ペア:

[(1, 21021940), (2, 10510970), (4, 5255485), (5, 4204388), (10, 2102194), (20, 1051097), (941, 22340), (1117, 18820), (1882, 11170), (2234, 9410), (3764, 5585), (4468, 4705)]