20757765

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{401}}^1$

素因数の和:462

約数の個数: 64

約数和(自身を含む): 41679360

約数和(自身を除く): 20921595

約数列:

[1, 3, 5, 7, 15, 17, 21, 29, 35, 51, 85, 87, 105, 119, 145, 203, 255, 357, 401, 435, 493, 595, 609, 1015, 1203, 1479, 1785, 2005, 2465, 2807, 3045, 3451, 6015, 6817, 7395, 8421, 10353, 11629, 14035, 17255, 20451, 34085, 34887, 42105, 47719, 51765, 58145, 81403, 102255, 143157, 174435, 197693, 238595, 244209, 407015, 593079, 715785, 988465, 1221045, 1383851, 2965395, 4151553, 6919255, 20757765]

約数ペア:

[(1, 20757765), (3, 6919255), (5, 4151553), (7, 2965395), (15, 1383851), (17, 1221045), (21, 988465), (29, 715785), (35, 593079), (51, 407015), (85, 244209), (87, 238595), (105, 197693), (119, 174435), (145, 143157), (203, 102255), (255, 81403), (357, 58145), (401, 51765), (435, 47719), (493, 42105), (595, 34887), (609, 34085), (1015, 20451), (1203, 17255), (1479, 14035), (1785, 11629), (2005, 10353), (2465, 8421), (2807, 7395), (3045, 6817), (3451, 6015)]