19810320

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{197}}^1\times {\mathrm{419}}^1$

素因数の和:632

約数の個数: 80

約数和(自身を含む): 61871040

約数和(自身を除く): 42060720

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, 419, 591, 788, 838, 985, 1182, 1257, 1576, 1676, 1970, 2095, 2364, 2514, 2955, 3152, 3352, 3940, 4190, 4728, 5028, 5910, 6285, 6704, 7880, 8380, 9456, 10056, 11820, 12570, 15760, 16760, 20112, 23640, 25140, 33520, 47280, 50280, 82543, 100560, 165086, 247629, 330172, 412715, 495258, 660344, 825430, 990516, 1238145, 1320688, 1650860, 1981032, 2476290, 3301720, 3962064, 4952580, 6603440, 9905160, 19810320]

約数ペア:

[(1, 19810320), (2, 9905160), (3, 6603440), (4, 4952580), (5, 3962064), (6, 3301720), (8, 2476290), (10, 1981032), (12, 1650860), (15, 1320688), (16, 1238145), (20, 990516), (24, 825430), (30, 660344), (40, 495258), (48, 412715), (60, 330172), (80, 247629), (120, 165086), (197, 100560), (240, 82543), (394, 50280), (419, 47280), (591, 33520), (788, 25140), (838, 23640), (985, 20112), (1182, 16760), (1257, 15760), (1576, 12570), (1676, 11820), (1970, 10056), (2095, 9456), (2364, 8380), (2514, 7880), (2955, 6704), (3152, 6285), (3352, 5910), (3940, 5028), (4190, 4728)]