20717961

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{173}}^1\times {\mathrm{191}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 32071680

約数和(自身を除く): 11353719

約数列:

[1, 3, 11, 19, 33, 57, 173, 191, 209, 519, 573, 627, 1903, 2101, 3287, 3629, 5709, 6303, 9861, 10887, 33043, 36157, 39919, 99129, 108471, 119757, 363473, 627817, 1090419, 1883451, 6905987, 20717961]

約数ペア:

[(1, 20717961), (3, 6905987), (11, 1883451), (19, 1090419), (33, 627817), (57, 363473), (173, 119757), (191, 108471), (209, 99129), (519, 39919), (573, 36157), (627, 33043), (1903, 10887), (2101, 9861), (3287, 6303), (3629, 5709)]