21378075

素因数分解:

$3^1\times 5^2\times {\mathrm{29}}^1\times {\mathrm{9829}}^1$

素因数の和:9871

約数の個数: 24

約数和(自身を含む): 36567600

約数和(自身を除く): 15189525

約数列:

[1, 3, 5, 15, 25, 29, 75, 87, 145, 435, 725, 2175, 9829, 29487, 49145, 147435, 245725, 285041, 737175, 855123, 1425205, 4275615, 7126025, 21378075]

約数ペア:

[(1, 21378075), (3, 7126025), (5, 4275615), (15, 1425205), (25, 855123), (29, 737175), (75, 285041), (87, 245725), (145, 147435), (435, 49145), (725, 29487), (2175, 9829)]