21012278

素因数分解:

$2^1\times 7^2\times {\mathrm{149}}^1\times {\mathrm{1439}}^1$

素因数の和:1604

約数の個数: 24

約数和(自身を含む): 36936000

約数和(自身を除く): 15923722

約数列:

[1, 2, 7, 14, 49, 98, 149, 298, 1043, 1439, 2086, 2878, 7301, 10073, 14602, 20146, 70511, 141022, 214411, 428822, 1500877, 3001754, 10506139, 21012278]

約数ペア:

[(1, 21012278), (2, 10506139), (7, 3001754), (14, 1500877), (49, 428822), (98, 214411), (149, 141022), (298, 70511), (1043, 20146), (1439, 14602), (2086, 10073), (2878, 7301)]