81309725

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{151}}^1\times {\mathrm{181}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 123492096

約数和(自身を除く): 42182371

約数列:

[1, 5, 7, 17, 25, 35, 85, 119, 151, 175, 181, 425, 595, 755, 905, 1057, 1267, 2567, 2975, 3077, 3775, 4525, 5285, 6335, 12835, 15385, 17969, 21539, 26425, 27331, 31675, 64175, 76925, 89845, 107695, 136655, 191317, 449225, 464627, 538475, 683275, 956585, 2323135, 3252389, 4782925, 11615675, 16261945, 81309725]

約数ペア:

[(1, 81309725), (5, 16261945), (7, 11615675), (17, 4782925), (25, 3252389), (35, 2323135), (85, 956585), (119, 683275), (151, 538475), (175, 464627), (181, 449225), (425, 191317), (595, 136655), (755, 107695), (905, 89845), (1057, 76925), (1267, 64175), (2567, 31675), (2975, 27331), (3077, 26425), (3775, 21539), (4525, 17969), (5285, 15385), (6335, 12835)]