20705204

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{109}}^1\times {\mathrm{281}}^1$

素因数の和:420

約数の個数: 36

約数和(自身を含む): 39736620

約数和(自身を除く): 19031416

約数列:

[1, 2, 4, 13, 26, 52, 109, 169, 218, 281, 338, 436, 562, 676, 1124, 1417, 2834, 3653, 5668, 7306, 14612, 18421, 30629, 36842, 47489, 61258, 73684, 94978, 122516, 189956, 398177, 796354, 1592708, 5176301, 10352602, 20705204]

約数ペア:

[(1, 20705204), (2, 10352602), (4, 5176301), (13, 1592708), (26, 796354), (52, 398177), (109, 189956), (169, 122516), (218, 94978), (281, 73684), (338, 61258), (436, 47489), (562, 36842), (676, 30629), (1124, 18421), (1417, 14612), (2834, 7306), (3653, 5668)]