21890870

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{50909}}^1$

素因数の和:50959

約数の個数: 16

約数和(自身を含む): 40320720

約数和(自身を除く): 18429850

約数列:

[1, 2, 5, 10, 43, 86, 215, 430, 50909, 101818, 254545, 509090, 2189087, 4378174, 10945435, 21890870]

約数ペア:

[(1, 21890870), (2, 10945435), (5, 4378174), (10, 2189087), (43, 509090), (86, 254545), (215, 101818), (430, 50909)]