20908100

素因数分解:

$2^2\times 5^2\times {\mathrm{419}}^1\times {\mathrm{499}}^1$

素因数の和:932

約数の個数: 36

約数和(自身を含む): 45570000

約数和(自身を除く): 24661900

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 419, 499, 838, 998, 1676, 1996, 2095, 2495, 4190, 4990, 8380, 9980, 10475, 12475, 20950, 24950, 41900, 49900, 209081, 418162, 836324, 1045405, 2090810, 4181620, 5227025, 10454050, 20908100]

約数ペア:

[(1, 20908100), (2, 10454050), (4, 5227025), (5, 4181620), (10, 2090810), (20, 1045405), (25, 836324), (50, 418162), (100, 209081), (419, 49900), (499, 41900), (838, 24950), (998, 20950), (1676, 12475), (1996, 10475), (2095, 9980), (2495, 8380), (4190, 4990)]