389610020

素因数分解:

$2^2\times 5^1\times {\mathrm{19480501}}^1$

素因数の和:19480510

約数の個数: 12

約数和(自身を含む): 818181084

約数和(自身を除く): 428571064

約数列:

[1, 2, 4, 5, 10, 20, 19480501, 38961002, 77922004, 97402505, 194805010, 389610020]

約数ペア:

[(1, 389610020), (2, 194805010), (4, 97402505), (5, 77922004), (10, 38961002), (20, 19480501)]