20414380

素因数分解:

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

素因数の和:623

約数の個数: 72

約数和(自身を含む): 51308208

約数和(自身を除く): 30893828

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 37, 49, 70, 74, 98, 140, 148, 185, 196, 245, 259, 370, 490, 518, 563, 740, 980, 1036, 1126, 1295, 1813, 2252, 2590, 2815, 3626, 3941, 5180, 5630, 7252, 7882, 9065, 11260, 15764, 18130, 19705, 20831, 27587, 36260, 39410, 41662, 55174, 78820, 83324, 104155, 110348, 137935, 145817, 208310, 275870, 291634, 416620, 551740, 583268, 729085, 1020719, 1458170, 2041438, 2916340, 4082876, 5103595, 10207190, 20414380]

約数ペア:

[(1, 20414380), (2, 10207190), (4, 5103595), (5, 4082876), (7, 2916340), (10, 2041438), (14, 1458170), (20, 1020719), (28, 729085), (35, 583268), (37, 551740), (49, 416620), (70, 291634), (74, 275870), (98, 208310), (140, 145817), (148, 137935), (185, 110348), (196, 104155), (245, 83324), (259, 78820), (370, 55174), (490, 41662), (518, 39410), (563, 36260), (740, 27587), (980, 20831), (1036, 19705), (1126, 18130), (1295, 15764), (1813, 11260), (2252, 9065), (2590, 7882), (2815, 7252), (3626, 5630), (3941, 5180)]