21681165

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{1301}}^1$

素因数の和:1421

約数の個数: 32

約数和(自身を含む): 38247552

約数和(自身を除く): 16566387

約数列:

[1, 3, 5, 11, 15, 33, 55, 101, 165, 303, 505, 1111, 1301, 1515, 3333, 3903, 5555, 6505, 14311, 16665, 19515, 42933, 71555, 131401, 214665, 394203, 657005, 1445411, 1971015, 4336233, 7227055, 21681165]

約数ペア:

[(1, 21681165), (3, 7227055), (5, 4336233), (11, 1971015), (15, 1445411), (33, 657005), (55, 394203), (101, 214665), (165, 131401), (303, 71555), (505, 42933), (1111, 19515), (1301, 16665), (1515, 14311), (3333, 6505), (3903, 5555)]