19888760

素因数分解:

$2^3\times 5^1\times {\mathrm{157}}^1\times {\mathrm{3167}}^1$

素因数の和:3335

約数の個数: 32

約数和(自身を含む): 45048960

約数和(自身を除く): 25160200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 157, 314, 628, 785, 1256, 1570, 3140, 3167, 6280, 6334, 12668, 15835, 25336, 31670, 63340, 126680, 497219, 994438, 1988876, 2486095, 3977752, 4972190, 9944380, 19888760]

約数ペア:

[(1, 19888760), (2, 9944380), (4, 4972190), (5, 3977752), (8, 2486095), (10, 1988876), (20, 994438), (40, 497219), (157, 126680), (314, 63340), (628, 31670), (785, 25336), (1256, 15835), (1570, 12668), (3140, 6334), (3167, 6280)]