21256275

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^2\times {\mathrm{337}}^1$

素因数の和:408

約数の個数: 36

約数和(自身を含む): 36505352

約数和(自身を除く): 15249077

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 337, 435, 725, 841, 1011, 1685, 2175, 2523, 4205, 5055, 8425, 9773, 12615, 21025, 25275, 29319, 48865, 63075, 146595, 244325, 283417, 732975, 850251, 1417085, 4251255, 7085425, 21256275]

約数ペア:

[(1, 21256275), (3, 7085425), (5, 4251255), (15, 1417085), (25, 850251), (29, 732975), (75, 283417), (87, 244325), (145, 146595), (337, 63075), (435, 48865), (725, 29319), (841, 25275), (1011, 21025), (1685, 12615), (2175, 9773), (2523, 8425), (4205, 5055)]