20976711

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{401}}^1$

素因数の和:511

約数の個数: 32

約数和(自身を含む): 33343488

約数和(自身を除く): 12366777

約数列:

[1, 3, 7, 21, 47, 53, 141, 159, 329, 371, 401, 987, 1113, 1203, 2491, 2807, 7473, 8421, 17437, 18847, 21253, 52311, 56541, 63759, 131929, 148771, 395787, 446313, 998891, 2996673, 6992237, 20976711]

約数ペア:

[(1, 20976711), (3, 6992237), (7, 2996673), (21, 998891), (47, 446313), (53, 395787), (141, 148771), (159, 131929), (329, 63759), (371, 56541), (401, 52311), (987, 21253), (1113, 18847), (1203, 17437), (2491, 8421), (2807, 7473)]