21241925

素因数分解:

$5^2\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{331}}^1$

素因数の和:509

約数の個数: 24

約数和(自身を含む): 28158912

約数和(自身を除く): 6916987

約数列:

[1, 5, 17, 25, 85, 151, 331, 425, 755, 1655, 2567, 3775, 5627, 8275, 12835, 28135, 49981, 64175, 140675, 249905, 849677, 1249525, 4248385, 21241925]

約数ペア:

[(1, 21241925), (5, 4248385), (17, 1249525), (25, 849677), (85, 249905), (151, 140675), (331, 64175), (425, 49981), (755, 28135), (1655, 12835), (2567, 8275), (3775, 5627)]