20705205

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1\times {\mathrm{257}}^1$

素因数の和:437

約数の個数: 32

約数和(自身を含む): 34328448

約数和(自身を除く): 13623243

約数列:

[1, 3, 5, 15, 41, 123, 131, 205, 257, 393, 615, 655, 771, 1285, 1965, 3855, 5371, 10537, 16113, 26855, 31611, 33667, 52685, 80565, 101001, 158055, 168335, 505005, 1380347, 4141041, 6901735, 20705205]

約数ペア:

[(1, 20705205), (3, 6901735), (5, 4141041), (15, 1380347), (41, 505005), (123, 168335), (131, 158055), (205, 101001), (257, 80565), (393, 52685), (615, 33667), (655, 31611), (771, 26855), (1285, 16113), (1965, 10537), (3855, 5371)]