646384

素因数分解:

$2^4\times {\mathrm{71}}^1\times {\mathrm{569}}^1$

素因数の和:648

約数の個数: 20

約数和(自身を含む): 1272240

約数和(自身を除く): 625856

約数列:

[1, 2, 4, 8, 16, 71, 142, 284, 568, 569, 1136, 1138, 2276, 4552, 9104, 40399, 80798, 161596, 323192, 646384]

約数ペア:

[(1, 646384), (2, 323192), (4, 161596), (8, 80798), (16, 40399), (71, 9104), (142, 4552), (284, 2276), (568, 1138), (569, 1136)]