81849560

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{197}}^1$

素因数の和:285

約数の個数: 128

約数和(自身を含む): 215550720

約数和(自身を除く): 133701160

約数列:

[1, 2, 4, 5, 8, 10, 13, 17, 20, 26, 34, 40, 47, 52, 65, 68, 85, 94, 104, 130, 136, 170, 188, 197, 221, 235, 260, 340, 376, 394, 442, 470, 520, 611, 680, 788, 799, 884, 940, 985, 1105, 1222, 1576, 1598, 1768, 1880, 1970, 2210, 2444, 2561, 3055, 3196, 3349, 3940, 3995, 4420, 4888, 5122, 6110, 6392, 6698, 7880, 7990, 8840, 9259, 10244, 10387, 12220, 12805, 13396, 15980, 16745, 18518, 20488, 20774, 24440, 25610, 26792, 31960, 33490, 37036, 41548, 43537, 46295, 51220, 51935, 66980, 74072, 83096, 87074, 92590, 102440, 103870, 120367, 133960, 157403, 174148, 185180, 207740, 217685, 240734, 314806, 348296, 370360, 415480, 435370, 481468, 601835, 629612, 787015, 870740, 962936, 1203670, 1259224, 1574030, 1741480, 2046239, 2407340, 3148060, 4092478, 4814680, 6296120, 8184956, 10231195, 16369912, 20462390, 40924780, 81849560]

約数ペア:

[(1, 81849560), (2, 40924780), (4, 20462390), (5, 16369912), (8, 10231195), (10, 8184956), (13, 6296120), (17, 4814680), (20, 4092478), (26, 3148060), (34, 2407340), (40, 2046239), (47, 1741480), (52, 1574030), (65, 1259224), (68, 1203670), (85, 962936), (94, 870740), (104, 787015), (130, 629612), (136, 601835), (170, 481468), (188, 435370), (197, 415480), (221, 370360), (235, 348296), (260, 314806), (340, 240734), (376, 217685), (394, 207740), (442, 185180), (470, 174148), (520, 157403), (611, 133960), (680, 120367), (788, 103870), (799, 102440), (884, 92590), (940, 87074), (985, 83096), (1105, 74072), (1222, 66980), (1576, 51935), (1598, 51220), (1768, 46295), (1880, 43537), (1970, 41548), (2210, 37036), (2444, 33490), (2561, 31960), (3055, 26792), (3196, 25610), (3349, 24440), (3940, 20774), (3995, 20488), (4420, 18518), (4888, 16745), (5122, 15980), (6110, 13396), (6392, 12805), (6698, 12220), (7880, 10387), (7990, 10244), (8840, 9259)]