25109720

素因数分解:

$2^3\times 5^1\times {\mathrm{487}}^1\times {\mathrm{1289}}^1$

素因数の和:1787

約数の個数: 32

約数和(自身を含む): 56656800

約数和(自身を除く): 31547080

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 487, 974, 1289, 1948, 2435, 2578, 3896, 4870, 5156, 6445, 9740, 10312, 12890, 19480, 25780, 51560, 627743, 1255486, 2510972, 3138715, 5021944, 6277430, 12554860, 25109720]

約数ペア:

[(1, 25109720), (2, 12554860), (4, 6277430), (5, 5021944), (8, 3138715), (10, 2510972), (20, 1255486), (40, 627743), (487, 51560), (974, 25780), (1289, 19480), (1948, 12890), (2435, 10312), (2578, 9740), (3896, 6445), (4870, 5156)]