21075805

素因数分解:

$5^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{1607}}^1$

素因数の和:1716

約数の個数: 16

約数和(自身を含む): 26319744

約数和(自身を除く): 5243939

約数列:

[1, 5, 43, 61, 215, 305, 1607, 2623, 8035, 13115, 69101, 98027, 345505, 490135, 4215161, 21075805]

約数ペア:

[(1, 21075805), (5, 4215161), (43, 490135), (61, 345505), (215, 98027), (305, 69101), (1607, 13115), (2623, 8035)]