20971356

素因数分解:

$2^2\times 3^1\times 7^1\times {\mathrm{249659}}^1$

素因数の和:249673

約数の個数: 24

約数和(自身を含む): 55923840

約数和(自身を除く): 34952484

約数列:

[1, 2, 3, 4, 6, 7, 12, 14, 21, 28, 42, 84, 249659, 499318, 748977, 998636, 1497954, 1747613, 2995908, 3495226, 5242839, 6990452, 10485678, 20971356]

約数ペア:

[(1, 20971356), (2, 10485678), (3, 6990452), (4, 5242839), (6, 3495226), (7, 2995908), (12, 1747613), (14, 1497954), (21, 998636), (28, 748977), (42, 499318), (84, 249659)]