20891365

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12253}}^1$

素因数の和:12300

約数の個数: 16

約数和(自身を含む): 28233216

約数和(自身を除く): 7341851

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12253, 61265, 134783, 379843, 673915, 1899215, 4178273, 20891365]

約数ペア:

[(1, 20891365), (5, 4178273), (11, 1899215), (31, 673915), (55, 379843), (155, 134783), (341, 61265), (1705, 12253)]