28108520

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{193}}^1\times {\mathrm{331}}^1$

素因数の和:546

約数の個数: 64

約数和(自身を含む): 69560640

約数和(自身を除く): 41452120

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 193, 220, 331, 386, 440, 662, 772, 965, 1324, 1544, 1655, 1930, 2123, 2648, 3310, 3641, 3860, 4246, 6620, 7282, 7720, 8492, 10615, 13240, 14564, 16984, 18205, 21230, 29128, 36410, 42460, 63883, 72820, 84920, 127766, 145640, 255532, 319415, 511064, 638830, 702713, 1277660, 1405426, 2555320, 2810852, 3513565, 5621704, 7027130, 14054260, 28108520]

約数ペア:

[(1, 28108520), (2, 14054260), (4, 7027130), (5, 5621704), (8, 3513565), (10, 2810852), (11, 2555320), (20, 1405426), (22, 1277660), (40, 702713), (44, 638830), (55, 511064), (88, 319415), (110, 255532), (193, 145640), (220, 127766), (331, 84920), (386, 72820), (440, 63883), (662, 42460), (772, 36410), (965, 29128), (1324, 21230), (1544, 18205), (1655, 16984), (1930, 14564), (2123, 13240), (2648, 10615), (3310, 8492), (3641, 7720), (3860, 7282), (4246, 6620)]