20821900

素因数分解:

$2^2\times 5^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{823}}^1$

素因数の和:871

約数の個数: 72

約数和(自身を含む): 51496704

約数和(自身を除く): 30674804

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 23, 25, 44, 46, 50, 55, 92, 100, 110, 115, 220, 230, 253, 275, 460, 506, 550, 575, 823, 1012, 1100, 1150, 1265, 1646, 2300, 2530, 3292, 4115, 5060, 6325, 8230, 9053, 12650, 16460, 18106, 18929, 20575, 25300, 36212, 37858, 41150, 45265, 75716, 82300, 90530, 94645, 181060, 189290, 208219, 226325, 378580, 416438, 452650, 473225, 832876, 905300, 946450, 1041095, 1892900, 2082190, 4164380, 5205475, 10410950, 20821900]

約数ペア:

[(1, 20821900), (2, 10410950), (4, 5205475), (5, 4164380), (10, 2082190), (11, 1892900), (20, 1041095), (22, 946450), (23, 905300), (25, 832876), (44, 473225), (46, 452650), (50, 416438), (55, 378580), (92, 226325), (100, 208219), (110, 189290), (115, 181060), (220, 94645), (230, 90530), (253, 82300), (275, 75716), (460, 45265), (506, 41150), (550, 37858), (575, 36212), (823, 25300), (1012, 20575), (1100, 18929), (1150, 18106), (1265, 16460), (1646, 12650), (2300, 9053), (2530, 8230), (3292, 6325), (4115, 5060)]