21126440

素因数分解:

$2^3\times 5^1\times {\mathrm{67}}^1\times {\mathrm{7883}}^1$

素因数の和:7961

約数の個数: 32

約数和(自身を含む): 48250080

約数和(自身を除く): 27123640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 67, 134, 268, 335, 536, 670, 1340, 2680, 7883, 15766, 31532, 39415, 63064, 78830, 157660, 315320, 528161, 1056322, 2112644, 2640805, 4225288, 5281610, 10563220, 21126440]

約数ペア:

[(1, 21126440), (2, 10563220), (4, 5281610), (5, 4225288), (8, 2640805), (10, 2112644), (20, 1056322), (40, 528161), (67, 315320), (134, 157660), (268, 78830), (335, 63064), (536, 39415), (670, 31532), (1340, 15766), (2680, 7883)]