19909840

素因数分解:

$2^4\times 5^1\times {\mathrm{191}}^1\times {\mathrm{1303}}^1$

素因数の和:1507

約数の個数: 40

約数和(自身を含む): 46568448

約数和(自身を除く): 26658608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 191, 382, 764, 955, 1303, 1528, 1910, 2606, 3056, 3820, 5212, 6515, 7640, 10424, 13030, 15280, 20848, 26060, 52120, 104240, 248873, 497746, 995492, 1244365, 1990984, 2488730, 3981968, 4977460, 9954920, 19909840]

約数ペア:

[(1, 19909840), (2, 9954920), (4, 4977460), (5, 3981968), (8, 2488730), (10, 1990984), (16, 1244365), (20, 995492), (40, 497746), (80, 248873), (191, 104240), (382, 52120), (764, 26060), (955, 20848), (1303, 15280), (1528, 13030), (1910, 10424), (2606, 7640), (3056, 6515), (3820, 5212)]