19778840

素因数分解:

$2^3\times 5^1\times {\mathrm{494471}}^1$

素因数の和:494482

約数の個数: 16

約数和(自身を含む): 44502480

約数和(自身を除く): 24723640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 494471, 988942, 1977884, 2472355, 3955768, 4944710, 9889420, 19778840]

約数ペア:

[(1, 19778840), (2, 9889420), (4, 4944710), (5, 3955768), (8, 2472355), (10, 1977884), (20, 988942), (40, 494471)]