21285016

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{601}}^1$

素因数の和:859

約数の個数: 32

約数和(自身を含む): 42260400

約数和(自身を除く): 20975384

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 233, 466, 601, 932, 1202, 1864, 2404, 4427, 4808, 8854, 11419, 17708, 22838, 35416, 45676, 91352, 140033, 280066, 560132, 1120264, 2660627, 5321254, 10642508, 21285016]

約数ペア:

[(1, 21285016), (2, 10642508), (4, 5321254), (8, 2660627), (19, 1120264), (38, 560132), (76, 280066), (152, 140033), (233, 91352), (466, 45676), (601, 35416), (932, 22838), (1202, 17708), (1864, 11419), (2404, 8854), (4427, 4808)]