398661320

素因数分解:

$2^3\times 5^1\times {\mathrm{9966533}}^1$

素因数の和:9966544

約数の個数: 16

約数和(自身を含む): 896988060

約数和(自身を除く): 498326740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9966533, 19933066, 39866132, 49832665, 79732264, 99665330, 199330660, 398661320]

約数ペア:

[(1, 398661320), (2, 199330660), (4, 99665330), (5, 79732264), (8, 49832665), (10, 39866132), (20, 19933066), (40, 9966533)]