19814975

素因数分解:

$5^2\times {\mathrm{29}}^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:371

約数の個数: 24

約数和(自身を含む): 25727520

約数和(自身を除く): 5912545

約数列:

[1, 5, 25, 29, 145, 151, 181, 725, 755, 905, 3775, 4379, 4525, 5249, 21895, 26245, 27331, 109475, 131225, 136655, 683275, 792599, 3962995, 19814975]

約数ペア:

[(1, 19814975), (5, 3962995), (25, 792599), (29, 683275), (145, 136655), (151, 131225), (181, 109475), (725, 27331), (755, 26245), (905, 21895), (3775, 5249), (4379, 4525)]