21095965

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12373}}^1$

素因数の和:12420

約数の個数: 16

約数和(自身を含む): 28509696

約数和(自身を除く): 7413731

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12373, 61865, 136103, 383563, 680515, 1917815, 4219193, 21095965]

約数ペア:

[(1, 21095965), (5, 4219193), (11, 1917815), (31, 680515), (55, 383563), (155, 136103), (341, 61865), (1705, 12373)]