20858859

素因数分解:

$3^2\times 7^3\times {\mathrm{29}}^1\times {\mathrm{233}}^1$

素因数の和:289

約数の個数: 48

約数和(自身を含む): 36504000

約数和(自身を除く): 15645141

約数列:

[1, 3, 7, 9, 21, 29, 49, 63, 87, 147, 203, 233, 261, 343, 441, 609, 699, 1029, 1421, 1631, 1827, 2097, 3087, 4263, 4893, 6757, 9947, 11417, 12789, 14679, 20271, 29841, 34251, 47299, 60813, 79919, 89523, 102753, 141897, 239757, 331093, 425691, 719271, 993279, 2317651, 2979837, 6952953, 20858859]

約数ペア:

[(1, 20858859), (3, 6952953), (7, 2979837), (9, 2317651), (21, 993279), (29, 719271), (49, 425691), (63, 331093), (87, 239757), (147, 141897), (203, 102753), (233, 89523), (261, 79919), (343, 60813), (441, 47299), (609, 34251), (699, 29841), (1029, 20271), (1421, 14679), (1631, 12789), (1827, 11417), (2097, 9947), (3087, 6757), (4263, 4893)]