21217821

素因数分解:

$3^1\times {\mathrm{29}}^1\times {\mathrm{47}}^1\times {\mathrm{5189}}^1$

素因数の和:5268

約数の個数: 16

約数和(自身を含む): 29894400

約数和(自身を除く): 8676579

約数列:

[1, 3, 29, 47, 87, 141, 1363, 4089, 5189, 15567, 150481, 243883, 451443, 731649, 7072607, 21217821]

約数ペア:

[(1, 21217821), (3, 7072607), (29, 731649), (47, 451443), (87, 243883), (141, 150481), (1363, 15567), (4089, 5189)]