21995631

素因数分解:

$3^5\times 7^1\times {\mathrm{67}}^1\times {\mathrm{193}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 38415104

約数和(自身を除く): 16419473

約数列:

[1, 3, 7, 9, 21, 27, 63, 67, 81, 189, 193, 201, 243, 469, 567, 579, 603, 1351, 1407, 1701, 1737, 1809, 4053, 4221, 5211, 5427, 12159, 12663, 12931, 15633, 16281, 36477, 37989, 38793, 46899, 90517, 109431, 113967, 116379, 271551, 328293, 349137, 814653, 1047411, 2443959, 3142233, 7331877, 21995631]

約数ペア:

[(1, 21995631), (3, 7331877), (7, 3142233), (9, 2443959), (21, 1047411), (27, 814653), (63, 349137), (67, 328293), (81, 271551), (189, 116379), (193, 113967), (201, 109431), (243, 90517), (469, 46899), (567, 38793), (579, 37989), (603, 36477), (1351, 16281), (1407, 15633), (1701, 12931), (1737, 12663), (1809, 12159), (4053, 5427), (4221, 5211)]