639352072

素因数分解:

$2^3\times {\mathrm{409}}^1\times {\mathrm{195401}}^1$

素因数の和:195816

約数の個数: 16

約数和(自身を含む): 1201722300

約数和(自身を除く): 562370228

約数列:

[1, 2, 4, 8, 409, 818, 1636, 3272, 195401, 390802, 781604, 1563208, 79919009, 159838018, 319676036, 639352072]

約数ペア:

[(1, 639352072), (2, 319676036), (4, 159838018), (8, 79919009), (409, 1563208), (818, 781604), (1636, 390802), (3272, 195401)]