20809577480

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{307}}^1\times {\mathrm{89189}}^1$

素因数の和:89526

約数の個数: 64

約数和(自身を含む): 49446936000

約数和(自身を除く): 28637358520

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 307, 380, 614, 760, 1228, 1535, 2456, 3070, 5833, 6140, 11666, 12280, 23332, 29165, 46664, 58330, 89189, 116660, 178378, 233320, 356756, 445945, 713512, 891890, 1694591, 1783780, 3389182, 3567560, 6778364, 8472955, 13556728, 16945910, 27381023, 33891820, 54762046, 67783640, 109524092, 136905115, 219048184, 273810230, 520239437, 547620460, 1040478874, 1095240920, 2080957748, 2601197185, 4161915496, 5202394370, 10404788740, 20809577480]

約数ペア:

[(1, 20809577480), (2, 10404788740), (4, 5202394370), (5, 4161915496), (8, 2601197185), (10, 2080957748), (19, 1095240920), (20, 1040478874), (38, 547620460), (40, 520239437), (76, 273810230), (95, 219048184), (152, 136905115), (190, 109524092), (307, 67783640), (380, 54762046), (614, 33891820), (760, 27381023), (1228, 16945910), (1535, 13556728), (2456, 8472955), (3070, 6778364), (5833, 3567560), (6140, 3389182), (11666, 1783780), (12280, 1694591), (23332, 891890), (29165, 713512), (46664, 445945), (58330, 356756), (89189, 233320), (116660, 178378)]