20506720

素因数分解:

$2^5\times 5^1\times {\mathrm{13}}^1\times {\mathrm{9859}}^1$

素因数の和:9887

約数の個数: 48

約数和(自身を含む): 52179120

約数和(自身を除く): 31672400

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 52, 65, 80, 104, 130, 160, 208, 260, 416, 520, 1040, 2080, 9859, 19718, 39436, 49295, 78872, 98590, 128167, 157744, 197180, 256334, 315488, 394360, 512668, 640835, 788720, 1025336, 1281670, 1577440, 2050672, 2563340, 4101344, 5126680, 10253360, 20506720]

約数ペア:

[(1, 20506720), (2, 10253360), (4, 5126680), (5, 4101344), (8, 2563340), (10, 2050672), (13, 1577440), (16, 1281670), (20, 1025336), (26, 788720), (32, 640835), (40, 512668), (52, 394360), (65, 315488), (80, 256334), (104, 197180), (130, 157744), (160, 128167), (208, 98590), (260, 78872), (416, 49295), (520, 39436), (1040, 19718), (2080, 9859)]