19904880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{421}}^1$

素因数の和:634

約数の個数: 80

約数和(自身を含む): 62165664

約数和(自身を除く): 42260784

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 197, 240, 394, 421, 591, 788, 842, 985, 1182, 1263, 1576, 1684, 1970, 2105, 2364, 2526, 2955, 3152, 3368, 3940, 4210, 4728, 5052, 5910, 6315, 6736, 7880, 8420, 9456, 10104, 11820, 12630, 15760, 16840, 20208, 23640, 25260, 33680, 47280, 50520, 82937, 101040, 165874, 248811, 331748, 414685, 497622, 663496, 829370, 995244, 1244055, 1326992, 1658740, 1990488, 2488110, 3317480, 3980976, 4976220, 6634960, 9952440, 19904880]

約数ペア:

[(1, 19904880), (2, 9952440), (3, 6634960), (4, 4976220), (5, 3980976), (6, 3317480), (8, 2488110), (10, 1990488), (12, 1658740), (15, 1326992), (16, 1244055), (20, 995244), (24, 829370), (30, 663496), (40, 497622), (48, 414685), (60, 331748), (80, 248811), (120, 165874), (197, 101040), (240, 82937), (394, 50520), (421, 47280), (591, 33680), (788, 25260), (842, 23640), (985, 20208), (1182, 16840), (1263, 15760), (1576, 12630), (1684, 11820), (1970, 10104), (2105, 9456), (2364, 8420), (2526, 7880), (2955, 6736), (3152, 6315), (3368, 5910), (3940, 5052), (4210, 4728)]