31998640

素因数分解:

$2^4\times 5^1\times {\mathrm{399983}}^1$

素因数の和:399996

約数の個数: 20

約数和(自身を含む): 74397024

約数和(自身を除く): 42398384

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 399983, 799966, 1599932, 1999915, 3199864, 3999830, 6399728, 7999660, 15999320, 31998640]

約数ペア:

[(1, 31998640), (2, 15999320), (4, 7999660), (5, 6399728), (8, 3999830), (10, 3199864), (16, 1999915), (20, 1599932), (40, 799966), (80, 399983)]