21179417

素因数分解:

$7^2\times {\mathrm{31}}^1\times {\mathrm{73}}^1\times {\mathrm{191}}^1$

素因数の和:309

約数の個数: 24

約数和(自身を含む): 25915392

約数和(自身を除く): 4735975

約数列:

[1, 7, 31, 49, 73, 191, 217, 511, 1337, 1519, 2263, 3577, 5921, 9359, 13943, 15841, 41447, 97601, 110887, 290129, 432233, 683207, 3025631, 21179417]

約数ペア:

[(1, 21179417), (7, 3025631), (31, 683207), (49, 432233), (73, 290129), (191, 110887), (217, 97601), (511, 41447), (1337, 15841), (1519, 13943), (2263, 9359), (3577, 5921)]