21308679

素因数分解:

$3^2\times 7^2\times {\mathrm{211}}^1\times {\mathrm{229}}^1$

素因数の和:460

約数の個数: 36

約数和(自身を含む): 36131160

約数和(自身を除く): 14822481

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 211, 229, 441, 633, 687, 1477, 1603, 1899, 2061, 4431, 4809, 10339, 11221, 13293, 14427, 31017, 33663, 48319, 93051, 100989, 144957, 338233, 434871, 1014699, 2367631, 3044097, 7102893, 21308679]

約数ペア:

[(1, 21308679), (3, 7102893), (7, 3044097), (9, 2367631), (21, 1014699), (49, 434871), (63, 338233), (147, 144957), (211, 100989), (229, 93051), (441, 48319), (633, 33663), (687, 31017), (1477, 14427), (1603, 13293), (1899, 11221), (2061, 10339), (4431, 4809)]