21390545

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{13411}}^1$

素因数の和:13456

約数の個数: 16

約数和(自身を含む): 28969920

約数和(自身を除く): 7579375

約数列:

[1, 5, 11, 29, 55, 145, 319, 1595, 13411, 67055, 147521, 388919, 737605, 1944595, 4278109, 21390545]

約数ペア:

[(1, 21390545), (5, 4278109), (11, 1944595), (29, 737605), (55, 388919), (145, 147521), (319, 67055), (1595, 13411)]