213885

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{97}}^1$

素因数の和:122

約数の個数: 36

約数和(自身を含む): 435708

約数和(自身を除く): 221823

約数列:

[1, 3, 5, 7, 9, 15, 21, 35, 45, 49, 63, 97, 105, 147, 245, 291, 315, 441, 485, 679, 735, 873, 1455, 2037, 2205, 3395, 4365, 4753, 6111, 10185, 14259, 23765, 30555, 42777, 71295, 213885]

約数ペア:

[(1, 213885), (3, 71295), (5, 42777), (7, 30555), (9, 23765), (15, 14259), (21, 10185), (35, 6111), (45, 4753), (49, 4365), (63, 3395), (97, 2205), (105, 2037), (147, 1455), (245, 873), (291, 735), (315, 679), (441, 485)]