20557075

素因数分解:

$5^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:268

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 11940845

約数列:

[1, 5, 7, 11, 25, 35, 55, 59, 77, 175, 181, 275, 295, 385, 413, 649, 905, 1267, 1475, 1925, 1991, 2065, 3245, 4525, 4543, 6335, 9955, 10325, 10679, 13937, 16225, 22715, 31675, 49775, 53395, 69685, 74753, 113575, 117469, 266975, 348425, 373765, 587345, 822283, 1868825, 2936725, 4111415, 20557075]

約数ペア:

[(1, 20557075), (5, 4111415), (7, 2936725), (11, 1868825), (25, 822283), (35, 587345), (55, 373765), (59, 348425), (77, 266975), (175, 117469), (181, 113575), (275, 74753), (295, 69685), (385, 53395), (413, 49775), (649, 31675), (905, 22715), (1267, 16225), (1475, 13937), (1925, 10679), (1991, 10325), (2065, 9955), (3245, 6335), (4525, 4543)]