20865915

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{9463}}^1$

素因数の和:9488

約数の個数: 36

約数和(自身を含む): 42076944

約数和(自身を除く): 21211029

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 105, 147, 245, 315, 441, 735, 2205, 9463, 28389, 47315, 66241, 85167, 141945, 198723, 331205, 425835, 463687, 596169, 993615, 1391061, 2318435, 2980845, 4173183, 6955305, 20865915]

約数ペア:

[(1, 20865915), (3, 6955305), (5, 4173183), (7, 2980845), (9, 2318435), (15, 1391061), (21, 993615), (35, 596169), (45, 463687), (49, 425835), (63, 331205), (105, 198723), (147, 141945), (245, 85167), (315, 66241), (441, 47315), (735, 28389), (2205, 9463)]