20447420

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{7687}}^1$

素因数の和:7722

約数の個数: 48

約数和(自身を含む): 51663360

約数和(自身を除く): 31215940

約数列:

[1, 2, 4, 5, 7, 10, 14, 19, 20, 28, 35, 38, 70, 76, 95, 133, 140, 190, 266, 380, 532, 665, 1330, 2660, 7687, 15374, 30748, 38435, 53809, 76870, 107618, 146053, 153740, 215236, 269045, 292106, 538090, 584212, 730265, 1022371, 1076180, 1460530, 2044742, 2921060, 4089484, 5111855, 10223710, 20447420]

約数ペア:

[(1, 20447420), (2, 10223710), (4, 5111855), (5, 4089484), (7, 2921060), (10, 2044742), (14, 1460530), (19, 1076180), (20, 1022371), (28, 730265), (35, 584212), (38, 538090), (70, 292106), (76, 269045), (95, 215236), (133, 153740), (140, 146053), (190, 107618), (266, 76870), (380, 53809), (532, 38435), (665, 30748), (1330, 15374), (2660, 7687)]