21071970

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{137}}^1\times {\mathrm{1709}}^1$

素因数の和:1859

約数の個数: 48

約数和(自身を含む): 55219320

約数和(自身を除く): 34147350

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90, 137, 274, 411, 685, 822, 1233, 1370, 1709, 2055, 2466, 3418, 4110, 5127, 6165, 8545, 10254, 12330, 15381, 17090, 25635, 30762, 51270, 76905, 153810, 234133, 468266, 702399, 1170665, 1404798, 2107197, 2341330, 3511995, 4214394, 7023990, 10535985, 21071970]

約数ペア:

[(1, 21071970), (2, 10535985), (3, 7023990), (5, 4214394), (6, 3511995), (9, 2341330), (10, 2107197), (15, 1404798), (18, 1170665), (30, 702399), (45, 468266), (90, 234133), (137, 153810), (274, 76905), (411, 51270), (685, 30762), (822, 25635), (1233, 17090), (1370, 15381), (1709, 12330), (2055, 10254), (2466, 8545), (3418, 6165), (4110, 5127)]