21450580

素因数分解:

$2^2\times 5^1\times {\mathrm{97}}^1\times {\mathrm{11057}}^1$

素因数の和:11163

約数の個数: 24

約数和(自身を含む): 45514728

約数和(自身を除く): 24064148

約数列:

[1, 2, 4, 5, 10, 20, 97, 194, 388, 485, 970, 1940, 11057, 22114, 44228, 55285, 110570, 221140, 1072529, 2145058, 4290116, 5362645, 10725290, 21450580]

約数ペア:

[(1, 21450580), (2, 10725290), (4, 5362645), (5, 4290116), (10, 2145058), (20, 1072529), (97, 221140), (194, 110570), (388, 55285), (485, 44228), (970, 22114), (1940, 11057)]