21315380

素因数分解:

$2^2\times 5^1\times {\mathrm{67}}^1\times {\mathrm{15907}}^1$

素因数の和:15983

約数の個数: 24

約数和(自身を含む): 45433248

約数和(自身を除く): 24117868

約数列:

[1, 2, 4, 5, 10, 20, 67, 134, 268, 335, 670, 1340, 15907, 31814, 63628, 79535, 159070, 318140, 1065769, 2131538, 4263076, 5328845, 10657690, 21315380]

約数ペア:

[(1, 21315380), (2, 10657690), (4, 5328845), (5, 4263076), (10, 2131538), (20, 1065769), (67, 318140), (134, 159070), (268, 79535), (335, 63628), (670, 31814), (1340, 15907)]