21636760

素因数分解:

$2^3\times 5^1\times {\mathrm{31}}^1\times {\mathrm{17449}}^1$

素因数の和:17491

約数の個数: 32

約数和(自身を含む): 50256000

約数和(自身を除く): 28619240

約数列:

[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 17449, 34898, 69796, 87245, 139592, 174490, 348980, 540919, 697960, 1081838, 2163676, 2704595, 4327352, 5409190, 10818380, 21636760]

約数ペア:

[(1, 21636760), (2, 10818380), (4, 5409190), (5, 4327352), (8, 2704595), (10, 2163676), (20, 1081838), (31, 697960), (40, 540919), (62, 348980), (124, 174490), (155, 139592), (248, 87245), (310, 69796), (620, 34898), (1240, 17449)]