81657520

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{37}}^1\times {\mathrm{563}}^1$

素因数の和:627

約数の個数: 120

約数和(自身を含む): 227222064

約数和(自身を除く): 145564544

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 37, 40, 49, 56, 70, 74, 80, 98, 112, 140, 148, 185, 196, 245, 259, 280, 296, 370, 392, 490, 518, 560, 563, 592, 740, 784, 980, 1036, 1126, 1295, 1480, 1813, 1960, 2072, 2252, 2590, 2815, 2960, 3626, 3920, 3941, 4144, 4504, 5180, 5630, 7252, 7882, 9008, 9065, 10360, 11260, 14504, 15764, 18130, 19705, 20720, 20831, 22520, 27587, 29008, 31528, 36260, 39410, 41662, 45040, 55174, 63056, 72520, 78820, 83324, 104155, 110348, 137935, 145040, 145817, 157640, 166648, 208310, 220696, 275870, 291634, 315280, 333296, 416620, 441392, 551740, 583268, 729085, 833240, 1020719, 1103480, 1166536, 1458170, 1666480, 2041438, 2206960, 2333072, 2916340, 4082876, 5103595, 5832680, 8165752, 10207190, 11665360, 16331504, 20414380, 40828760, 81657520]

約数ペア:

[(1, 81657520), (2, 40828760), (4, 20414380), (5, 16331504), (7, 11665360), (8, 10207190), (10, 8165752), (14, 5832680), (16, 5103595), (20, 4082876), (28, 2916340), (35, 2333072), (37, 2206960), (40, 2041438), (49, 1666480), (56, 1458170), (70, 1166536), (74, 1103480), (80, 1020719), (98, 833240), (112, 729085), (140, 583268), (148, 551740), (185, 441392), (196, 416620), (245, 333296), (259, 315280), (280, 291634), (296, 275870), (370, 220696), (392, 208310), (490, 166648), (518, 157640), (560, 145817), (563, 145040), (592, 137935), (740, 110348), (784, 104155), (980, 83324), (1036, 78820), (1126, 72520), (1295, 63056), (1480, 55174), (1813, 45040), (1960, 41662), (2072, 39410), (2252, 36260), (2590, 31528), (2815, 29008), (2960, 27587), (3626, 22520), (3920, 20831), (3941, 20720), (4144, 19705), (4504, 18130), (5180, 15764), (5630, 14504), (7252, 11260), (7882, 10360), (9008, 9065)]