638137945

素因数分解:

$5^1\times {\mathrm{31}}^1\times {\mathrm{149}}^1\times {\mathrm{27631}}^1$

素因数の和:27816

約数の個数: 16

約数和(自身を含む): 795801600

約数和(自身を除く): 157663655

約数列:

[1, 5, 31, 149, 155, 745, 4619, 23095, 27631, 138155, 856561, 4117019, 4282805, 20585095, 127627589, 638137945]

約数ペア:

[(1, 638137945), (5, 127627589), (31, 20585095), (149, 4282805), (155, 4117019), (745, 856561), (4619, 138155), (23095, 27631)]