21781356

素因数分解:

$2^2\times 3^1\times {\mathrm{137}}^1\times {\mathrm{13249}}^1$

素因数の和:13393

約数の個数: 24

約数和(自身を含む): 51198000

約数和(自身を除く): 29416644

約数列:

[1, 2, 3, 4, 6, 12, 137, 274, 411, 548, 822, 1644, 13249, 26498, 39747, 52996, 79494, 158988, 1815113, 3630226, 5445339, 7260452, 10890678, 21781356]

約数ペア:

[(1, 21781356), (2, 10890678), (3, 7260452), (4, 5445339), (6, 3630226), (12, 1815113), (137, 158988), (274, 79494), (411, 52996), (548, 39747), (822, 26498), (1644, 13249)]