21357819

素因数分解:

$3^2\times 7^1\times {\mathrm{181}}^1\times {\mathrm{1873}}^1$

素因数の和:2067

約数の個数: 24

約数和(自身を含む): 35471072

約数和(自身を除く): 14113253

約数列:

[1, 3, 7, 9, 21, 63, 181, 543, 1267, 1629, 1873, 3801, 5619, 11403, 13111, 16857, 39333, 117999, 339013, 1017039, 2373091, 3051117, 7119273, 21357819]

約数ペア:

[(1, 21357819), (3, 7119273), (7, 3051117), (9, 2373091), (21, 1017039), (63, 339013), (181, 117999), (543, 39333), (1267, 16857), (1629, 13111), (1873, 11403), (3801, 5619)]