39997840

素因数分解:

$2^4\times 5^1\times {\mathrm{499973}}^1$

素因数の和:499986

約数の個数: 20

約数和(自身を含む): 92995164

約数和(自身を除く): 52997324

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 499973, 999946, 1999892, 2499865, 3999784, 4999730, 7999568, 9999460, 19998920, 39997840]

約数ペア:

[(1, 39997840), (2, 19998920), (4, 9999460), (5, 7999568), (8, 4999730), (10, 3999784), (16, 2499865), (20, 1999892), (40, 999946), (80, 499973)]