28171665

素因数分解:

$3^3\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{211}}^1$

素因数の和:291

約数の個数: 64

約数和(自身を含む): 53729280

約数和(自身を除く): 25557615

約数列:

[1, 3, 5, 9, 15, 23, 27, 43, 45, 69, 115, 129, 135, 207, 211, 215, 345, 387, 621, 633, 645, 989, 1035, 1055, 1161, 1899, 1935, 2967, 3105, 3165, 4853, 4945, 5697, 5805, 8901, 9073, 9495, 14559, 14835, 24265, 26703, 27219, 28485, 43677, 44505, 45365, 72795, 81657, 131031, 133515, 136095, 208679, 218385, 244971, 408285, 626037, 655155, 1043395, 1224855, 1878111, 3130185, 5634333, 9390555, 28171665]

約数ペア:

[(1, 28171665), (3, 9390555), (5, 5634333), (9, 3130185), (15, 1878111), (23, 1224855), (27, 1043395), (43, 655155), (45, 626037), (69, 408285), (115, 244971), (129, 218385), (135, 208679), (207, 136095), (211, 133515), (215, 131031), (345, 81657), (387, 72795), (621, 45365), (633, 44505), (645, 43677), (989, 28485), (1035, 27219), (1055, 26703), (1161, 24265), (1899, 14835), (1935, 14559), (2967, 9495), (3105, 9073), (3165, 8901), (4853, 5805), (4945, 5697)]