21516284

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{3181}}^1$

素因数の和:3293

約数の個数: 24

約数和(自身を含む): 40093200

約数和(自身を除く): 18576916

約数列:

[1, 2, 4, 19, 38, 76, 89, 178, 356, 1691, 3181, 3382, 6362, 6764, 12724, 60439, 120878, 241756, 283109, 566218, 1132436, 5379071, 10758142, 21516284]

約数ペア:

[(1, 21516284), (2, 10758142), (4, 5379071), (19, 1132436), (38, 566218), (76, 283109), (89, 241756), (178, 120878), (356, 60439), (1691, 12724), (3181, 6764), (3382, 6362)]