21495859

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{2099}}^1$

素因数の和:2143

約数の個数: 24

約数和(自身を含む): 28728000

約数和(自身を除く): 7232141

約数列:

[1, 7, 11, 19, 49, 77, 133, 209, 539, 931, 1463, 2099, 10241, 14693, 23089, 39881, 102851, 161623, 279167, 438691, 1131361, 1954169, 3070837, 21495859]

約数ペア:

[(1, 21495859), (7, 3070837), (11, 1954169), (19, 1131361), (49, 438691), (77, 279167), (133, 161623), (209, 102851), (539, 39881), (931, 23089), (1463, 14693), (2099, 10241)]