81408140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{73}}^1\times {\mathrm{137}}^1$

素因数の和:267

約数の個数: 96

約数和(自身を含む): 195580224

約数和(自身を除く): 114172084

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 37, 44, 55, 73, 74, 110, 137, 146, 148, 185, 220, 274, 292, 365, 370, 407, 548, 685, 730, 740, 803, 814, 1370, 1460, 1507, 1606, 1628, 2035, 2701, 2740, 3014, 3212, 4015, 4070, 5069, 5402, 6028, 7535, 8030, 8140, 10001, 10138, 10804, 13505, 15070, 16060, 20002, 20276, 25345, 27010, 29711, 30140, 40004, 50005, 50690, 54020, 55759, 59422, 100010, 101380, 110011, 111518, 118844, 148555, 200020, 220022, 223036, 278795, 297110, 370037, 440044, 550055, 557590, 594220, 740074, 1100110, 1115180, 1480148, 1850185, 2200220, 3700370, 4070407, 7400740, 8140814, 16281628, 20352035, 40704070, 81408140]

約数ペア:

[(1, 81408140), (2, 40704070), (4, 20352035), (5, 16281628), (10, 8140814), (11, 7400740), (20, 4070407), (22, 3700370), (37, 2200220), (44, 1850185), (55, 1480148), (73, 1115180), (74, 1100110), (110, 740074), (137, 594220), (146, 557590), (148, 550055), (185, 440044), (220, 370037), (274, 297110), (292, 278795), (365, 223036), (370, 220022), (407, 200020), (548, 148555), (685, 118844), (730, 111518), (740, 110011), (803, 101380), (814, 100010), (1370, 59422), (1460, 55759), (1507, 54020), (1606, 50690), (1628, 50005), (2035, 40004), (2701, 30140), (2740, 29711), (3014, 27010), (3212, 25345), (4015, 20276), (4070, 20002), (5069, 16060), (5402, 15070), (6028, 13505), (7535, 10804), (8030, 10138), (8140, 10001)]