21726008

素因数分解:

$2^3\times {\mathrm{43}}^1\times {\mathrm{137}}^1\times {\mathrm{461}}^1$

素因数の和:647

約数の個数: 32

約数和(自身を含む): 42078960

約数和(自身を除く): 20352952

約数列:

[1, 2, 4, 8, 43, 86, 137, 172, 274, 344, 461, 548, 922, 1096, 1844, 3688, 5891, 11782, 19823, 23564, 39646, 47128, 63157, 79292, 126314, 158584, 252628, 505256, 2715751, 5431502, 10863004, 21726008]

約数ペア:

[(1, 21726008), (2, 10863004), (4, 5431502), (8, 2715751), (43, 505256), (86, 252628), (137, 158584), (172, 126314), (274, 79292), (344, 63157), (461, 47128), (548, 39646), (922, 23564), (1096, 19823), (1844, 11782), (3688, 5891)]