20658715

素因数分解:

$5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{2333}}^1$

素因数の和:2379

約数の個数: 32

約数和(自身を含む): 32265216

約数和(自身を除く): 11606501

約数列:

[1, 5, 7, 11, 23, 35, 55, 77, 115, 161, 253, 385, 805, 1265, 1771, 2333, 8855, 11665, 16331, 25663, 53659, 81655, 128315, 179641, 268295, 375613, 590249, 898205, 1878065, 2951245, 4131743, 20658715]

約数ペア:

[(1, 20658715), (5, 4131743), (7, 2951245), (11, 1878065), (23, 898205), (35, 590249), (55, 375613), (77, 268295), (115, 179641), (161, 128315), (253, 81655), (385, 53659), (805, 25663), (1265, 16331), (1771, 11665), (2333, 8855)]