2720408080

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{16661}}^1$

素因数の和:16844

約数の個数: 80

約数和(自身を含む): 6855279984

約数和(自身を除く): 4134871904

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 40, 52, 65, 80, 104, 130, 157, 208, 260, 314, 520, 628, 785, 1040, 1256, 1570, 2041, 2512, 3140, 4082, 6280, 8164, 10205, 12560, 16328, 16661, 20410, 32656, 33322, 40820, 66644, 81640, 83305, 133288, 163280, 166610, 216593, 266576, 333220, 433186, 666440, 866372, 1082965, 1332880, 1732744, 2165930, 2615777, 3465488, 4331860, 5231554, 8663720, 10463108, 13078885, 17327440, 20926216, 26157770, 34005101, 41852432, 52315540, 68010202, 104631080, 136020404, 170025505, 209262160, 272040808, 340051010, 544081616, 680102020, 1360204040, 2720408080]

約数ペア:

[(1, 2720408080), (2, 1360204040), (4, 680102020), (5, 544081616), (8, 340051010), (10, 272040808), (13, 209262160), (16, 170025505), (20, 136020404), (26, 104631080), (40, 68010202), (52, 52315540), (65, 41852432), (80, 34005101), (104, 26157770), (130, 20926216), (157, 17327440), (208, 13078885), (260, 10463108), (314, 8663720), (520, 5231554), (628, 4331860), (785, 3465488), (1040, 2615777), (1256, 2165930), (1570, 1732744), (2041, 1332880), (2512, 1082965), (3140, 866372), (4082, 666440), (6280, 433186), (8164, 333220), (10205, 266576), (12560, 216593), (16328, 166610), (16661, 163280), (20410, 133288), (32656, 83305), (33322, 81640), (40820, 66644)]