399878410

素因数分解:

$2^1\times 5^1\times {\mathrm{991}}^1\times {\mathrm{40351}}^1$

素因数の和:41349

約数の個数: 16

約数和(自身を含む): 720525312

約数和(自身を除く): 320646902

約数列:

[1, 2, 5, 10, 991, 1982, 4955, 9910, 40351, 80702, 201755, 403510, 39987841, 79975682, 199939205, 399878410]

約数ペア:

[(1, 399878410), (2, 199939205), (5, 79975682), (10, 39987841), (991, 403510), (1982, 201755), (4955, 80702), (9910, 40351)]