21286040

素因数分解:

$2^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{1361}}^1$

素因数の和:1412

約数の個数: 64

約数和(自身を含む): 52954560

約数和(自身を除く): 31668520

約数列:

[1, 2, 4, 5, 8, 10, 17, 20, 23, 34, 40, 46, 68, 85, 92, 115, 136, 170, 184, 230, 340, 391, 460, 680, 782, 920, 1361, 1564, 1955, 2722, 3128, 3910, 5444, 6805, 7820, 10888, 13610, 15640, 23137, 27220, 31303, 46274, 54440, 62606, 92548, 115685, 125212, 156515, 185096, 231370, 250424, 313030, 462740, 532151, 626060, 925480, 1064302, 1252120, 2128604, 2660755, 4257208, 5321510, 10643020, 21286040]

約数ペア:

[(1, 21286040), (2, 10643020), (4, 5321510), (5, 4257208), (8, 2660755), (10, 2128604), (17, 1252120), (20, 1064302), (23, 925480), (34, 626060), (40, 532151), (46, 462740), (68, 313030), (85, 250424), (92, 231370), (115, 185096), (136, 156515), (170, 125212), (184, 115685), (230, 92548), (340, 62606), (391, 54440), (460, 46274), (680, 31303), (782, 27220), (920, 23137), (1361, 15640), (1564, 13610), (1955, 10888), (2722, 7820), (3128, 6805), (3910, 5444)]