20998523

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{29}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:231

約数の個数: 32

約数和(自身を含む): 27350400

約数和(自身を除く): 6351877

約数列:

[1, 7, 13, 29, 73, 91, 109, 203, 377, 511, 763, 949, 1417, 2117, 2639, 3161, 6643, 7957, 9919, 14819, 22127, 27521, 41093, 55699, 103441, 192647, 230753, 287651, 724087, 1615271, 2999789, 20998523]

約数ペア:

[(1, 20998523), (7, 2999789), (13, 1615271), (29, 724087), (73, 287651), (91, 230753), (109, 192647), (203, 103441), (377, 55699), (511, 41093), (763, 27521), (949, 22127), (1417, 14819), (2117, 9919), (2639, 7957), (3161, 6643)]