21153905

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{6343}}^1$

素因数の和:6400

約数の個数: 16

約数和(自身を含む): 27406080

約数和(自身を除く): 6252175

約数列:

[1, 5, 23, 29, 115, 145, 667, 3335, 6343, 31715, 145889, 183947, 729445, 919735, 4230781, 21153905]

約数ペア:

[(1, 21153905), (5, 4230781), (23, 919735), (29, 729445), (115, 183947), (145, 145889), (667, 31715), (3335, 6343)]