21112971

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{151}}^1\times {\mathrm{223}}^1$

素因数の和:407

約数の個数: 32

約数和(自身を含む): 32686080

約数和(自身を除く): 11573109

約数列:

[1, 3, 11, 19, 33, 57, 151, 209, 223, 453, 627, 669, 1661, 2453, 2869, 4237, 4983, 7359, 8607, 12711, 31559, 33673, 46607, 94677, 101019, 139821, 370403, 639787, 1111209, 1919361, 7037657, 21112971]

約数ペア:

[(1, 21112971), (3, 7037657), (11, 1919361), (19, 1111209), (33, 639787), (57, 370403), (151, 139821), (209, 101019), (223, 94677), (453, 46607), (627, 33673), (669, 31559), (1661, 12711), (2453, 8607), (2869, 7359), (4237, 4983)]