21988827

素因数分解:

$3^6\times 7^1\times {\mathrm{31}}^1\times {\mathrm{139}}^1$

素因数の和:195

約数の個数: 56

約数和(自身を含む): 39173120

約数和(自身を除く): 17184293

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 81, 93, 139, 189, 217, 243, 279, 417, 567, 651, 729, 837, 973, 1251, 1701, 1953, 2511, 2919, 3753, 4309, 5103, 5859, 7533, 8757, 11259, 12927, 17577, 22599, 26271, 30163, 33777, 38781, 52731, 78813, 90489, 101331, 116343, 158193, 236439, 271467, 349029, 709317, 814401, 1047087, 2443203, 3141261, 7329609, 21988827]

約数ペア:

[(1, 21988827), (3, 7329609), (7, 3141261), (9, 2443203), (21, 1047087), (27, 814401), (31, 709317), (63, 349029), (81, 271467), (93, 236439), (139, 158193), (189, 116343), (217, 101331), (243, 90489), (279, 78813), (417, 52731), (567, 38781), (651, 33777), (729, 30163), (837, 26271), (973, 22599), (1251, 17577), (1701, 12927), (1953, 11259), (2511, 8757), (2919, 7533), (3753, 5859), (4309, 5103)]