81209908

素因数分解:

$2^2\times {\mathrm{13}}^3\times {\mathrm{9241}}^1$

素因数の和:9284

約数の個数: 24

約数和(自身を含む): 153971720

約数和(自身を除く): 72761812

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 2197, 4394, 8788, 9241, 18482, 36964, 120133, 240266, 480532, 1561729, 3123458, 6246916, 20302477, 40604954, 81209908]

約数ペア:

[(1, 81209908), (2, 40604954), (4, 20302477), (13, 6246916), (26, 3123458), (52, 1561729), (169, 480532), (338, 240266), (676, 120133), (2197, 36964), (4394, 18482), (8788, 9241)]