20521347

素因数分解:

$3^1\times 7^5\times {\mathrm{11}}^1\times {\mathrm{37}}^1$

素因数の和:86

約数の個数: 48

約数和(自身を含む): 35764992

約数和(自身を除く): 15243645

約数列:

[1, 3, 7, 11, 21, 33, 37, 49, 77, 111, 147, 231, 259, 343, 407, 539, 777, 1029, 1221, 1617, 1813, 2401, 2849, 3773, 5439, 7203, 8547, 11319, 12691, 16807, 19943, 26411, 38073, 50421, 59829, 79233, 88837, 139601, 184877, 266511, 418803, 554631, 621859, 977207, 1865577, 2931621, 6840449, 20521347]

約数ペア:

[(1, 20521347), (3, 6840449), (7, 2931621), (11, 1865577), (21, 977207), (33, 621859), (37, 554631), (49, 418803), (77, 266511), (111, 184877), (147, 139601), (231, 88837), (259, 79233), (343, 59829), (407, 50421), (539, 38073), (777, 26411), (1029, 19943), (1221, 16807), (1617, 12691), (1813, 11319), (2401, 8547), (2849, 7203), (3773, 5439)]