20639675

素因数分解:

$5^2\times 7^1\times {\mathrm{59}}^1\times {\mathrm{1999}}^1$

素因数の和:2075

約数の個数: 24

約数和(自身を含む): 29760000

約数和(自身を除く): 9120325

約数列:

[1, 5, 7, 25, 35, 59, 175, 295, 413, 1475, 1999, 2065, 9995, 10325, 13993, 49975, 69965, 117941, 349825, 589705, 825587, 2948525, 4127935, 20639675]

約数ペア:

[(1, 20639675), (5, 4127935), (7, 2948525), (25, 825587), (35, 589705), (59, 349825), (175, 117941), (295, 69965), (413, 49975), (1475, 13993), (1999, 10325), (2065, 9995)]