20747285

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{43}}^1\times {\mathrm{571}}^1$

素因数の和:645

約数の個数: 24

約数和(自身を含む): 27634464

約数和(自身を除く): 6887179

約数列:

[1, 5, 13, 43, 65, 169, 215, 559, 571, 845, 2795, 2855, 7267, 7423, 24553, 36335, 37115, 96499, 122765, 319189, 482495, 1595945, 4149457, 20747285]

約数ペア:

[(1, 20747285), (5, 4149457), (13, 1595945), (43, 482495), (65, 319189), (169, 122765), (215, 96499), (559, 37115), (571, 36335), (845, 24553), (2795, 7423), (2855, 7267)]