1640289

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{4111}}^1$

素因数の和:4140

約数の個数: 16

約数和(自身を含む): 2631680

約数和(自身を除く): 991391

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 4111, 12333, 28777, 78109, 86331, 234327, 546763, 1640289]

約数ペア:

[(1, 1640289), (3, 546763), (7, 234327), (19, 86331), (21, 78109), (57, 28777), (133, 12333), (399, 4111)]