21992278

素因数分解:

$2^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{887}}^1$

素因数の和:937

約数の個数: 48

約数和(自身を含む): 43732224

約数和(自身を除く): 21739946

約数列:

[1, 2, 7, 11, 14, 22, 23, 46, 49, 77, 98, 154, 161, 253, 322, 506, 539, 887, 1078, 1127, 1771, 1774, 2254, 3542, 6209, 9757, 12397, 12418, 19514, 20401, 24794, 40802, 43463, 68299, 86926, 136598, 142807, 224411, 285614, 448822, 478093, 956186, 999649, 1570877, 1999298, 3141754, 10996139, 21992278]

約数ペア:

[(1, 21992278), (2, 10996139), (7, 3141754), (11, 1999298), (14, 1570877), (22, 999649), (23, 956186), (46, 478093), (49, 448822), (77, 285614), (98, 224411), (154, 142807), (161, 136598), (253, 86926), (322, 68299), (506, 43463), (539, 40802), (887, 24794), (1078, 20401), (1127, 19514), (1771, 12418), (1774, 12397), (2254, 9757), (3542, 6209)]