8661640

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{16657}}^1$

素因数の和:16681

約数の個数: 32

約数和(自身を含む): 20989080

約数和(自身を除く): 12327440

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 16657, 33314, 66628, 83285, 133256, 166570, 216541, 333140, 433082, 666280, 866164, 1082705, 1732328, 2165410, 4330820, 8661640]

約数ペア:

[(1, 8661640), (2, 4330820), (4, 2165410), (5, 1732328), (8, 1082705), (10, 866164), (13, 666280), (20, 433082), (26, 333140), (40, 216541), (52, 166570), (65, 133256), (104, 83285), (130, 66628), (260, 33314), (520, 16657)]