21218668

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{3137}}^1$

素因数の和:3249

約数の個数: 24

約数和(自身を含む): 39538800

約数和(自身を除く): 18320132

約数列:

[1, 2, 4, 19, 38, 76, 89, 178, 356, 1691, 3137, 3382, 6274, 6764, 12548, 59603, 119206, 238412, 279193, 558386, 1116772, 5304667, 10609334, 21218668]

約数ペア:

[(1, 21218668), (2, 10609334), (4, 5304667), (19, 1116772), (38, 558386), (76, 279193), (89, 238412), (178, 119206), (356, 59603), (1691, 12548), (3137, 6764), (3382, 6274)]