19896921

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{163}}^1$

素因数の和:323

約数の個数: 40

約数和(自身を含む): 32861664

約数和(自身を除く): 12964743

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 137, 163, 297, 411, 489, 891, 1233, 1467, 1507, 1793, 3699, 4401, 4521, 5379, 11097, 13203, 13563, 16137, 22331, 40689, 48411, 66993, 122067, 145233, 200979, 245641, 602937, 736923, 1808811, 2210769, 6632307, 19896921]

約数ペア:

[(1, 19896921), (3, 6632307), (9, 2210769), (11, 1808811), (27, 736923), (33, 602937), (81, 245641), (99, 200979), (137, 145233), (163, 122067), (297, 66993), (411, 48411), (489, 40689), (891, 22331), (1233, 16137), (1467, 13563), (1507, 13203), (1793, 11097), (3699, 5379), (4401, 4521)]