21001788

素因数分解:

$2^2\times 3^3\times {\mathrm{139}}^1\times {\mathrm{1399}}^1$

素因数の和:1551

約数の個数: 48

約数和(自身を含む): 54880000

約数和(自身を除く): 33878212

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108, 139, 278, 417, 556, 834, 1251, 1399, 1668, 2502, 2798, 3753, 4197, 5004, 5596, 7506, 8394, 12591, 15012, 16788, 25182, 37773, 50364, 75546, 151092, 194461, 388922, 583383, 777844, 1166766, 1750149, 2333532, 3500298, 5250447, 7000596, 10500894, 21001788]

約数ペア:

[(1, 21001788), (2, 10500894), (3, 7000596), (4, 5250447), (6, 3500298), (9, 2333532), (12, 1750149), (18, 1166766), (27, 777844), (36, 583383), (54, 388922), (108, 194461), (139, 151092), (278, 75546), (417, 50364), (556, 37773), (834, 25182), (1251, 16788), (1399, 15012), (1668, 12591), (2502, 8394), (2798, 7506), (3753, 5596), (4197, 5004)]