21385940

素因数分解:

$2^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{22751}}^1$

素因数の和:22807

約数の個数: 24

約数和(自身を含む): 45868032

約数和(自身を除く): 24482092

約数列:

[1, 2, 4, 5, 10, 20, 47, 94, 188, 235, 470, 940, 22751, 45502, 91004, 113755, 227510, 455020, 1069297, 2138594, 4277188, 5346485, 10692970, 21385940]

約数ペア:

[(1, 21385940), (2, 10692970), (4, 5346485), (5, 4277188), (10, 2138594), (20, 1069297), (47, 455020), (94, 227510), (188, 113755), (235, 91004), (470, 45502), (940, 22751)]