21608188

素因数分解:

$2^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{137}}^1$

素因数の和:322

約数の個数: 48

約数和(自身を含む): 44884224

約数和(自身を除く): 23276036

約数列:

[1, 2, 4, 7, 14, 28, 43, 86, 131, 137, 172, 262, 274, 301, 524, 548, 602, 917, 959, 1204, 1834, 1918, 3668, 3836, 5633, 5891, 11266, 11782, 17947, 22532, 23564, 35894, 39431, 41237, 71788, 78862, 82474, 125629, 157724, 164948, 251258, 502516, 771721, 1543442, 3086884, 5402047, 10804094, 21608188]

約数ペア:

[(1, 21608188), (2, 10804094), (4, 5402047), (7, 3086884), (14, 1543442), (28, 771721), (43, 502516), (86, 251258), (131, 164948), (137, 157724), (172, 125629), (262, 82474), (274, 78862), (301, 71788), (524, 41237), (548, 39431), (602, 35894), (917, 23564), (959, 22532), (1204, 17947), (1834, 11782), (1918, 11266), (3668, 5891), (3836, 5633)]