19779700

素因数分解:

$2^2\times 5^2\times {\mathrm{139}}^1\times {\mathrm{1423}}^1$

素因数の和:1576

約数の個数: 36

約数和(自身を含む): 43261120

約数和(自身を除く): 23481420

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 139, 278, 556, 695, 1390, 1423, 2780, 2846, 3475, 5692, 6950, 7115, 13900, 14230, 28460, 35575, 71150, 142300, 197797, 395594, 791188, 988985, 1977970, 3955940, 4944925, 9889850, 19779700]

約数ペア:

[(1, 19779700), (2, 9889850), (4, 4944925), (5, 3955940), (10, 1977970), (20, 988985), (25, 791188), (50, 395594), (100, 197797), (139, 142300), (278, 71150), (556, 35575), (695, 28460), (1390, 14230), (1423, 13900), (2780, 7115), (2846, 6950), (3475, 5692)]