21091235

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20183}}^1$

素因数の和:20218

約数の個数: 16

約数和(自身を含む): 29064960

約数和(自身を除く): 7973725

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20183, 100915, 222013, 383477, 1110065, 1917385, 4218247, 21091235]

約数ペア:

[(1, 21091235), (5, 4218247), (11, 1917385), (19, 1110065), (55, 383477), (95, 222013), (209, 100915), (1045, 20183)]