398726920

素因数分解:

$2^3\times 5^1\times {\mathrm{9968173}}^1$

素因数の和:9968184

約数の個数: 16

約数和(自身を含む): 897135660

約数和(自身を除く): 498408740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 9968173, 19936346, 39872692, 49840865, 79745384, 99681730, 199363460, 398726920]

約数ペア:

[(1, 398726920), (2, 199363460), (4, 99681730), (5, 79745384), (8, 49840865), (10, 39872692), (20, 19936346), (40, 9968173)]