209464857

素因数分解:

$3^2\times 7^2\times {\mathrm{474977}}^1$

素因数の和:474997

約数の個数: 18

約数和(自身を含む): 351958698

約数和(自身を除く): 142493841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 474977, 1424931, 3324839, 4274793, 9974517, 23273873, 29923551, 69821619, 209464857]

約数ペア:

[(1, 209464857), (3, 69821619), (7, 29923551), (9, 23273873), (21, 9974517), (49, 4274793), (63, 3324839), (147, 1424931), (441, 474977)]