21358323

素因数分解:

$3^4\times 7^1\times {\mathrm{139}}^1\times {\mathrm{271}}^1$

素因数の和:429

約数の個数: 40

約数和(自身を含む): 36861440

約数和(自身を除く): 15503117

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 139, 189, 271, 417, 567, 813, 973, 1251, 1897, 2439, 2919, 3753, 5691, 7317, 8757, 11259, 17073, 21951, 26271, 37669, 51219, 78813, 113007, 153657, 263683, 339021, 791049, 1017063, 2373147, 3051189, 7119441, 21358323]

約数ペア:

[(1, 21358323), (3, 7119441), (7, 3051189), (9, 2373147), (21, 1017063), (27, 791049), (63, 339021), (81, 263683), (139, 153657), (189, 113007), (271, 78813), (417, 51219), (567, 37669), (813, 26271), (973, 21951), (1251, 17073), (1897, 11259), (2439, 8757), (2919, 7317), (3753, 5691)]