639482879

素因数分解:

$7^2\times {\mathrm{83}}^1\times {\mathrm{97}}^1\times {\mathrm{1621}}^1$

素因数の和:1815

約数の個数: 24

約数和(自身を含む): 761081328

約数和(自身を除く): 121598449

約数列:

[1, 7, 49, 83, 97, 581, 679, 1621, 4067, 4753, 8051, 11347, 56357, 79429, 134543, 157237, 394499, 941801, 1100659, 6592607, 7704613, 13050671, 91354697, 639482879]

約数ペア:

[(1, 639482879), (7, 91354697), (49, 13050671), (83, 7704613), (97, 6592607), (581, 1100659), (679, 941801), (1621, 394499), (4067, 157237), (4753, 134543), (8051, 79429), (11347, 56357)]