20642769

素因数分解:

$3^4\times 7^3\times {\mathrm{743}}^1$

素因数の和:776

約数の個数: 40

約数和(自身を含む): 36009600

約数和(自身を除く): 15366831

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 81, 147, 189, 343, 441, 567, 743, 1029, 1323, 2229, 3087, 3969, 5201, 6687, 9261, 15603, 20061, 27783, 36407, 46809, 60183, 109221, 140427, 254849, 327663, 421281, 764547, 982989, 2293641, 2948967, 6880923, 20642769]

約数ペア:

[(1, 20642769), (3, 6880923), (7, 2948967), (9, 2293641), (21, 982989), (27, 764547), (49, 421281), (63, 327663), (81, 254849), (147, 140427), (189, 109221), (343, 60183), (441, 46809), (567, 36407), (743, 27783), (1029, 20061), (1323, 15603), (2229, 9261), (3087, 6687), (3969, 5201)]