81372500

素因数分解:

$2^2\times 5^4\times {\mathrm{11}}^2\times {\mathrm{269}}^1$

素因数の和:315

約数の個数: 90

約数和(自身を含む): 196319970

約数和(自身を除く): 114947470

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 44, 50, 55, 100, 110, 121, 125, 220, 242, 250, 269, 275, 484, 500, 538, 550, 605, 625, 1076, 1100, 1210, 1250, 1345, 1375, 2420, 2500, 2690, 2750, 2959, 3025, 5380, 5500, 5918, 6050, 6725, 6875, 11836, 12100, 13450, 13750, 14795, 15125, 26900, 27500, 29590, 30250, 32549, 33625, 59180, 60500, 65098, 67250, 73975, 75625, 130196, 134500, 147950, 151250, 162745, 168125, 295900, 302500, 325490, 336250, 369875, 650980, 672500, 739750, 813725, 1479500, 1627450, 1849375, 3254900, 3698750, 4068625, 7397500, 8137250, 16274500, 20343125, 40686250, 81372500]

約数ペア:

[(1, 81372500), (2, 40686250), (4, 20343125), (5, 16274500), (10, 8137250), (11, 7397500), (20, 4068625), (22, 3698750), (25, 3254900), (44, 1849375), (50, 1627450), (55, 1479500), (100, 813725), (110, 739750), (121, 672500), (125, 650980), (220, 369875), (242, 336250), (250, 325490), (269, 302500), (275, 295900), (484, 168125), (500, 162745), (538, 151250), (550, 147950), (605, 134500), (625, 130196), (1076, 75625), (1100, 73975), (1210, 67250), (1250, 65098), (1345, 60500), (1375, 59180), (2420, 33625), (2500, 32549), (2690, 30250), (2750, 29590), (2959, 27500), (3025, 26900), (5380, 15125), (5500, 14795), (5918, 13750), (6050, 13450), (6725, 12100), (6875, 11836)]