19813805

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{11621}}^1$

素因数の和:11668

約数の個数: 16

約数和(自身を含む): 26777088

約数和(自身を除く): 6963283

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 11621, 58105, 127831, 360251, 639155, 1801255, 3962761, 19813805]

約数ペア:

[(1, 19813805), (5, 3962761), (11, 1801255), (31, 639155), (55, 360251), (155, 127831), (341, 58105), (1705, 11621)]