20417800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{7853}}^1$

素因数の和:7882

約数の個数: 48

約数和(自身を含む): 51129540

約数和(自身を除く): 30711740

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 520, 650, 1300, 2600, 7853, 15706, 31412, 39265, 62824, 78530, 102089, 157060, 196325, 204178, 314120, 392650, 408356, 510445, 785300, 816712, 1020890, 1570600, 2041780, 2552225, 4083560, 5104450, 10208900, 20417800]

約数ペア:

[(1, 20417800), (2, 10208900), (4, 5104450), (5, 4083560), (8, 2552225), (10, 2041780), (13, 1570600), (20, 1020890), (25, 816712), (26, 785300), (40, 510445), (50, 408356), (52, 392650), (65, 314120), (100, 204178), (104, 196325), (130, 157060), (200, 102089), (260, 78530), (325, 62824), (520, 39265), (650, 31412), (1300, 15706), (2600, 7853)]