20877409

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{79}}^1\times {\mathrm{1987}}^1$

素因数の和:2092

約数の個数: 16

約数和(自身を含む): 25446400

約数和(自身を除く): 4568991

約数列:

[1, 7, 19, 79, 133, 553, 1501, 1987, 10507, 13909, 37753, 156973, 264271, 1098811, 2982487, 20877409]

約数ペア:

[(1, 20877409), (7, 2982487), (19, 1098811), (79, 264271), (133, 156973), (553, 37753), (1501, 13909), (1987, 10507)]