20961990

素因数分解:

$2^1\times 3^4\times 5^1\times 7^1\times {\mathrm{3697}}^1$

素因数の和:3723

約数の個数: 80

約数和(自身を含む): 64433952

約数和(自身を除く): 43471962

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 14, 15, 18, 21, 27, 30, 35, 42, 45, 54, 63, 70, 81, 90, 105, 126, 135, 162, 189, 210, 270, 315, 378, 405, 567, 630, 810, 945, 1134, 1890, 2835, 3697, 5670, 7394, 11091, 18485, 22182, 25879, 33273, 36970, 51758, 55455, 66546, 77637, 99819, 110910, 129395, 155274, 166365, 199638, 232911, 258790, 299457, 332730, 388185, 465822, 499095, 598914, 698733, 776370, 998190, 1164555, 1397466, 1497285, 2096199, 2329110, 2994570, 3493665, 4192398, 6987330, 10480995, 20961990]

約数ペア:

[(1, 20961990), (2, 10480995), (3, 6987330), (5, 4192398), (6, 3493665), (7, 2994570), (9, 2329110), (10, 2096199), (14, 1497285), (15, 1397466), (18, 1164555), (21, 998190), (27, 776370), (30, 698733), (35, 598914), (42, 499095), (45, 465822), (54, 388185), (63, 332730), (70, 299457), (81, 258790), (90, 232911), (105, 199638), (126, 166365), (135, 155274), (162, 129395), (189, 110910), (210, 99819), (270, 77637), (315, 66546), (378, 55455), (405, 51758), (567, 36970), (630, 33273), (810, 25879), (945, 22182), (1134, 18485), (1890, 11091), (2835, 7394), (3697, 5670)]