21515988

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{1289}}^1$

素因数の和:1416

約数の個数: 48

約数和(自身を含む): 54613440

約数和(自身を除く): 33097452

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 107, 156, 214, 321, 428, 642, 1284, 1289, 1391, 2578, 2782, 3867, 4173, 5156, 5564, 7734, 8346, 15468, 16692, 16757, 33514, 50271, 67028, 100542, 137923, 201084, 275846, 413769, 551692, 827538, 1655076, 1792999, 3585998, 5378997, 7171996, 10757994, 21515988]

約数ペア:

[(1, 21515988), (2, 10757994), (3, 7171996), (4, 5378997), (6, 3585998), (12, 1792999), (13, 1655076), (26, 827538), (39, 551692), (52, 413769), (78, 275846), (107, 201084), (156, 137923), (214, 100542), (321, 67028), (428, 50271), (642, 33514), (1284, 16757), (1289, 16692), (1391, 15468), (2578, 8346), (2782, 7734), (3867, 5564), (4173, 5156)]