81204656

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{390407}}^1$

素因数の和:390428

約数の個数: 20

約数和(自身を含む): 169437072

約数和(自身を除く): 88232416

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 390407, 780814, 1561628, 3123256, 5075291, 6246512, 10150582, 20301164, 40602328, 81204656]

約数ペア:

[(1, 81204656), (2, 40602328), (4, 20301164), (8, 10150582), (13, 6246512), (16, 5075291), (26, 3123256), (52, 1561628), (104, 780814), (208, 390407)]