256422760

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{13553}}^1$

素因数の和:13618

約数の個数: 64

約数和(自身を含む): 644086080

約数和(自身を除く): 387663320

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 43, 44, 55, 86, 88, 110, 172, 215, 220, 344, 430, 440, 473, 860, 946, 1720, 1892, 2365, 3784, 4730, 9460, 13553, 18920, 27106, 54212, 67765, 108424, 135530, 149083, 271060, 298166, 542120, 582779, 596332, 745415, 1165558, 1192664, 1490830, 2331116, 2913895, 2981660, 4662232, 5827790, 5963320, 6410569, 11655580, 12821138, 23311160, 25642276, 32052845, 51284552, 64105690, 128211380, 256422760]

約数ペア:

[(1, 256422760), (2, 128211380), (4, 64105690), (5, 51284552), (8, 32052845), (10, 25642276), (11, 23311160), (20, 12821138), (22, 11655580), (40, 6410569), (43, 5963320), (44, 5827790), (55, 4662232), (86, 2981660), (88, 2913895), (110, 2331116), (172, 1490830), (215, 1192664), (220, 1165558), (344, 745415), (430, 596332), (440, 582779), (473, 542120), (860, 298166), (946, 271060), (1720, 149083), (1892, 135530), (2365, 108424), (3784, 67765), (4730, 54212), (9460, 27106), (13553, 18920)]