21955401

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{881}}^1$

素因数の和:974

約数の個数: 32

約数和(自身を含む): 35562240

約数和(自身を除く): 13606839

約数列:

[1, 3, 9, 13, 27, 39, 71, 117, 213, 351, 639, 881, 923, 1917, 2643, 2769, 7929, 8307, 11453, 23787, 24921, 34359, 62551, 103077, 187653, 309231, 562959, 813163, 1688877, 2439489, 7318467, 21955401]

約数ペア:

[(1, 21955401), (3, 7318467), (9, 2439489), (13, 1688877), (27, 813163), (39, 562959), (71, 309231), (117, 187653), (213, 103077), (351, 62551), (639, 34359), (881, 24921), (923, 23787), (1917, 11453), (2643, 8307), (2769, 7929)]