21431725

素因数分解:

$5^2\times 7^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1\times {\mathrm{103}}^1$

素因数の和:190

約数の個数: 48

約数和(自身を含む): 32497920

約数和(自身を除く): 11066195

約数列:

[1, 5, 7, 25, 29, 35, 41, 103, 145, 175, 203, 205, 287, 515, 721, 725, 1015, 1025, 1189, 1435, 2575, 2987, 3605, 4223, 5075, 5945, 7175, 8323, 14935, 18025, 20909, 21115, 29561, 29725, 41615, 74675, 104545, 105575, 122467, 147805, 208075, 522725, 612335, 739025, 857269, 3061675, 4286345, 21431725]

約数ペア:

[(1, 21431725), (5, 4286345), (7, 3061675), (25, 857269), (29, 739025), (35, 612335), (41, 522725), (103, 208075), (145, 147805), (175, 122467), (203, 105575), (205, 104545), (287, 74675), (515, 41615), (721, 29725), (725, 29561), (1015, 21115), (1025, 20909), (1189, 18025), (1435, 14935), (2575, 8323), (2987, 7175), (3605, 5945), (4223, 5075)]