18927920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:318

約数の個数: 80

約数和(自身を含む): 48666528

約数和(自身を除く): 29738608

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 137, 157, 176, 220, 274, 314, 440, 548, 628, 685, 785, 880, 1096, 1256, 1370, 1507, 1570, 1727, 2192, 2512, 2740, 3014, 3140, 3454, 5480, 6028, 6280, 6908, 7535, 8635, 10960, 12056, 12560, 13816, 15070, 17270, 21509, 24112, 27632, 30140, 34540, 43018, 60280, 69080, 86036, 107545, 120560, 138160, 172072, 215090, 236599, 344144, 430180, 473198, 860360, 946396, 1182995, 1720720, 1892792, 2365990, 3785584, 4731980, 9463960, 18927920]

約数ペア:

[(1, 18927920), (2, 9463960), (4, 4731980), (5, 3785584), (8, 2365990), (10, 1892792), (11, 1720720), (16, 1182995), (20, 946396), (22, 860360), (40, 473198), (44, 430180), (55, 344144), (80, 236599), (88, 215090), (110, 172072), (137, 138160), (157, 120560), (176, 107545), (220, 86036), (274, 69080), (314, 60280), (440, 43018), (548, 34540), (628, 30140), (685, 27632), (785, 24112), (880, 21509), (1096, 17270), (1256, 15070), (1370, 13816), (1507, 12560), (1570, 12056), (1727, 10960), (2192, 8635), (2512, 7535), (2740, 6908), (3014, 6280), (3140, 6028), (3454, 5480)]