639719996

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{499}}^1\times {\mathrm{1109}}^1$

素因数の和:1646

約数の個数: 36

約数和(自身を含む): 1192695000

約数和(自身を除く): 552975004

約数列:

[1, 2, 4, 17, 34, 68, 289, 499, 578, 998, 1109, 1156, 1996, 2218, 4436, 8483, 16966, 18853, 33932, 37706, 75412, 144211, 288422, 320501, 553391, 576844, 641002, 1106782, 1282004, 2213564, 9407647, 18815294, 37630588, 159929999, 319859998, 639719996]

約数ペア:

[(1, 639719996), (2, 319859998), (4, 159929999), (17, 37630588), (34, 18815294), (68, 9407647), (289, 2213564), (499, 1282004), (578, 1106782), (998, 641002), (1109, 576844), (1156, 553391), (1996, 320501), (2218, 288422), (4436, 144211), (8483, 75412), (16966, 37706), (18853, 33932)]