20645495

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{229}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 28593600

約数和(自身を除く): 7948105

約数列:

[1, 5, 13, 19, 65, 73, 95, 229, 247, 365, 949, 1145, 1235, 1387, 2977, 4351, 4745, 6935, 14885, 16717, 18031, 21755, 56563, 83585, 90155, 217321, 282815, 317623, 1086605, 1588115, 4129099, 20645495]

約数ペア:

[(1, 20645495), (5, 4129099), (13, 1588115), (19, 1086605), (65, 317623), (73, 282815), (95, 217321), (229, 90155), (247, 83585), (365, 56563), (949, 21755), (1145, 18031), (1235, 16717), (1387, 14885), (2977, 6935), (4351, 4745)]