21201819

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{167}}^1\times {\mathrm{419}}^1$

素因数の和:690

約数の個数: 16

約数和(自身を含む): 28788480

約数和(自身を除く): 7586661

約数列:

[1, 3, 101, 167, 303, 419, 501, 1257, 16867, 42319, 50601, 69973, 126957, 209919, 7067273, 21201819]

約数ペア:

[(1, 21201819), (3, 7067273), (101, 209919), (167, 126957), (303, 69973), (419, 50601), (501, 42319), (1257, 16867)]