21316925

素因数分解:

$5^2\times 7^1\times {\mathrm{41}}^1\times {\mathrm{2971}}^1$

素因数の和:3029

約数の個数: 24

約数和(自身を含む): 30956352

約数和(自身を除く): 9639427

約数列:

[1, 5, 7, 25, 35, 41, 175, 205, 287, 1025, 1435, 2971, 7175, 14855, 20797, 74275, 103985, 121811, 519925, 609055, 852677, 3045275, 4263385, 21316925]

約数ペア:

[(1, 21316925), (5, 4263385), (7, 3045275), (25, 852677), (35, 609055), (41, 519925), (175, 121811), (205, 103985), (287, 74275), (1025, 20797), (1435, 14855), (2971, 7175)]