21400886

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{83}}^1\times {\mathrm{211}}^1$

素因数の和:356

約数の個数: 32

約数和(自身を含む): 35900928

約数和(自身を除く): 14500042

約数列:

[1, 2, 13, 26, 47, 83, 94, 166, 211, 422, 611, 1079, 1222, 2158, 2743, 3901, 5486, 7802, 9917, 17513, 19834, 35026, 50713, 101426, 128921, 227669, 257842, 455338, 823111, 1646222, 10700443, 21400886]

約数ペア:

[(1, 21400886), (2, 10700443), (13, 1646222), (26, 823111), (47, 455338), (83, 257842), (94, 227669), (166, 128921), (211, 101426), (422, 50713), (611, 35026), (1079, 19834), (1222, 17513), (2158, 9917), (2743, 7802), (3901, 5486)]