21081956

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3709}}^1$

素因数の和:3756

約数の個数: 36

約数和(自身を含む): 44408700

約数和(自身を除く): 23326744

約数列:

[1, 2, 4, 7, 14, 28, 29, 49, 58, 98, 116, 196, 203, 406, 812, 1421, 2842, 3709, 5684, 7418, 14836, 25963, 51926, 103852, 107561, 181741, 215122, 363482, 430244, 726964, 752927, 1505854, 3011708, 5270489, 10540978, 21081956]

約数ペア:

[(1, 21081956), (2, 10540978), (4, 5270489), (7, 3011708), (14, 1505854), (28, 752927), (29, 726964), (49, 430244), (58, 363482), (98, 215122), (116, 181741), (196, 107561), (203, 103852), (406, 51926), (812, 25963), (1421, 14836), (2842, 7418), (3709, 5684)]