28213780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{1471}}^1$

素因数の和:1624

約数の個数: 48

約数和(自身を含む): 68253696

約数和(自身を除く): 40039916

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 137, 140, 274, 548, 685, 959, 1370, 1471, 1918, 2740, 2942, 3836, 4795, 5884, 7355, 9590, 10297, 14710, 19180, 20594, 29420, 41188, 51485, 102970, 201527, 205940, 403054, 806108, 1007635, 1410689, 2015270, 2821378, 4030540, 5642756, 7053445, 14106890, 28213780]

約数ペア:

[(1, 28213780), (2, 14106890), (4, 7053445), (5, 5642756), (7, 4030540), (10, 2821378), (14, 2015270), (20, 1410689), (28, 1007635), (35, 806108), (70, 403054), (137, 205940), (140, 201527), (274, 102970), (548, 51485), (685, 41188), (959, 29420), (1370, 20594), (1471, 19180), (1918, 14710), (2740, 10297), (2942, 9590), (3836, 7355), (4795, 5884)]