20952920

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2659}}^1$

素因数の和:2867

約数の個数: 32

約数和(自身を含む): 47401200

約数和(自身を除く): 26448280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2659, 3940, 5318, 7880, 10636, 13295, 21272, 26590, 53180, 106360, 523823, 1047646, 2095292, 2619115, 4190584, 5238230, 10476460, 20952920]

約数ペア:

[(1, 20952920), (2, 10476460), (4, 5238230), (5, 4190584), (8, 2619115), (10, 2095292), (20, 1047646), (40, 523823), (197, 106360), (394, 53180), (788, 26590), (985, 21272), (1576, 13295), (1970, 10636), (2659, 7880), (3940, 5318)]