21828275

素因数分解:

$5^2\times 7^2\times {\mathrm{103}}^1\times {\mathrm{173}}^1$

素因数の和:300

約数の個数: 36

約数和(自身を含む): 31975632

約数和(自身を除く): 10147357

約数列:

[1, 5, 7, 25, 35, 49, 103, 173, 175, 245, 515, 721, 865, 1211, 1225, 2575, 3605, 4325, 5047, 6055, 8477, 17819, 18025, 25235, 30275, 42385, 89095, 124733, 126175, 211925, 445475, 623665, 873131, 3118325, 4365655, 21828275]

約数ペア:

[(1, 21828275), (5, 4365655), (7, 3118325), (25, 873131), (35, 623665), (49, 445475), (103, 211925), (173, 126175), (175, 124733), (245, 89095), (515, 42385), (721, 30275), (865, 25235), (1211, 18025), (1225, 17819), (2575, 8477), (3605, 6055), (4325, 5047)]