21129284

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{29}}^2\times {\mathrm{571}}^1$

素因数の和:644

約数の個数: 36

約数和(自身を含む): 41849808

約数和(自身を除く): 20720524

約数列:

[1, 2, 4, 11, 22, 29, 44, 58, 116, 319, 571, 638, 841, 1142, 1276, 1682, 2284, 3364, 6281, 9251, 12562, 16559, 18502, 25124, 33118, 37004, 66236, 182149, 364298, 480211, 728596, 960422, 1920844, 5282321, 10564642, 21129284]

約数ペア:

[(1, 21129284), (2, 10564642), (4, 5282321), (11, 1920844), (22, 960422), (29, 728596), (44, 480211), (58, 364298), (116, 182149), (319, 66236), (571, 37004), (638, 33118), (841, 25124), (1142, 18502), (1276, 16559), (1682, 12562), (2284, 9251), (3364, 6281)]