20161964

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{61}}^1\times {\mathrm{4349}}^1$

素因数の和:4433

約数の個数: 24

約数和(自身を含む): 37758000

約数和(自身を除く): 17596036

約数列:

[1, 2, 4, 19, 38, 61, 76, 122, 244, 1159, 2318, 4349, 4636, 8698, 17396, 82631, 165262, 265289, 330524, 530578, 1061156, 5040491, 10080982, 20161964]

約数ペア:

[(1, 20161964), (2, 10080982), (4, 5040491), (19, 1061156), (38, 530578), (61, 330524), (76, 265289), (122, 165262), (244, 82631), (1159, 17396), (2318, 8698), (4349, 4636)]