28257999

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{149}}^1\times {\mathrm{821}}^1$

素因数の和:991

約数の個数: 32

約数和(自身を含む): 47347200

約数和(自身を除く): 19089201

約数列:

[1, 3, 7, 11, 21, 33, 77, 149, 231, 447, 821, 1043, 1639, 2463, 3129, 4917, 5747, 9031, 11473, 17241, 27093, 34419, 63217, 122329, 189651, 366987, 856303, 1345619, 2568909, 4036857, 9419333, 28257999]

約数ペア:

[(1, 28257999), (3, 9419333), (7, 4036857), (11, 2568909), (21, 1345619), (33, 856303), (77, 366987), (149, 189651), (231, 122329), (447, 63217), (821, 34419), (1043, 27093), (1639, 17241), (2463, 11473), (3129, 9031), (4917, 5747)]