20819725

素因数分解:

$5^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{827}}^1$

素因数の和:909

約数の個数: 24

約数和(自身を含む): 27721440

約数和(自身を除く): 6901715

約数列:

[1, 5, 19, 25, 53, 95, 265, 475, 827, 1007, 1325, 4135, 5035, 15713, 20675, 25175, 43831, 78565, 219155, 392825, 832789, 1095775, 4163945, 20819725]

約数ペア:

[(1, 20819725), (5, 4163945), (19, 1095775), (25, 832789), (53, 392825), (95, 219155), (265, 78565), (475, 43831), (827, 25175), (1007, 20675), (1325, 15713), (4135, 5035)]