81888560

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{1109}}^1$

素因数の和:1206

約数の個数: 80

約数和(自身を含む): 208111680

約数和(自身を除く): 126223120

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 71, 80, 104, 130, 142, 208, 260, 284, 355, 520, 568, 710, 923, 1040, 1109, 1136, 1420, 1846, 2218, 2840, 3692, 4436, 4615, 5545, 5680, 7384, 8872, 9230, 11090, 14417, 14768, 17744, 18460, 22180, 28834, 36920, 44360, 57668, 72085, 73840, 78739, 88720, 115336, 144170, 157478, 230672, 288340, 314956, 393695, 576680, 629912, 787390, 1023607, 1153360, 1259824, 1574780, 2047214, 3149560, 4094428, 5118035, 6299120, 8188856, 10236070, 16377712, 20472140, 40944280, 81888560]

約数ペア:

[(1, 81888560), (2, 40944280), (4, 20472140), (5, 16377712), (8, 10236070), (10, 8188856), (13, 6299120), (16, 5118035), (20, 4094428), (26, 3149560), (40, 2047214), (52, 1574780), (65, 1259824), (71, 1153360), (80, 1023607), (104, 787390), (130, 629912), (142, 576680), (208, 393695), (260, 314956), (284, 288340), (355, 230672), (520, 157478), (568, 144170), (710, 115336), (923, 88720), (1040, 78739), (1109, 73840), (1136, 72085), (1420, 57668), (1846, 44360), (2218, 36920), (2840, 28834), (3692, 22180), (4436, 18460), (4615, 17744), (5545, 14768), (5680, 14417), (7384, 11090), (8872, 9230)]