20979525

素因数分解:

$3^1\times 5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{449}}^1$

素因数の和:558

約数の個数: 48

約数和(自身を含む): 40176000

約数和(自身を除く): 19196475

約数列:

[1, 3, 5, 7, 15, 21, 25, 35, 75, 89, 105, 175, 267, 445, 449, 525, 623, 1335, 1347, 1869, 2225, 2245, 3115, 3143, 6675, 6735, 9345, 9429, 11225, 15575, 15715, 33675, 39961, 46725, 47145, 78575, 119883, 199805, 235725, 279727, 599415, 839181, 999025, 1398635, 2997075, 4195905, 6993175, 20979525]

約数ペア:

[(1, 20979525), (3, 6993175), (5, 4195905), (7, 2997075), (15, 1398635), (21, 999025), (25, 839181), (35, 599415), (75, 279727), (89, 235725), (105, 199805), (175, 119883), (267, 78575), (445, 47145), (449, 46725), (525, 39961), (623, 33675), (1335, 15715), (1347, 15575), (1869, 11225), (2225, 9429), (2245, 9345), (3115, 6735), (3143, 6675)]