21508808

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{89}}^1\times {\mathrm{1777}}^1$

素因数の和:1889

約数の個数: 32

約数和(自身を含む): 43205400

約数和(自身を除く): 21696592

約数列:

[1, 2, 4, 8, 17, 34, 68, 89, 136, 178, 356, 712, 1513, 1777, 3026, 3554, 6052, 7108, 12104, 14216, 30209, 60418, 120836, 158153, 241672, 316306, 632612, 1265224, 2688601, 5377202, 10754404, 21508808]

約数ペア:

[(1, 21508808), (2, 10754404), (4, 5377202), (8, 2688601), (17, 1265224), (34, 632612), (68, 316306), (89, 241672), (136, 158153), (178, 120836), (356, 60418), (712, 30209), (1513, 14216), (1777, 12104), (3026, 7108), (3554, 6052)]