21520740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{1429}}^1$

素因数の和:1692

約数の個数: 48

約数和(自身を含む): 60540480

約数和(自身を除く): 39019740

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 251, 502, 753, 1004, 1255, 1429, 1506, 2510, 2858, 3012, 3765, 4287, 5020, 5716, 7145, 7530, 8574, 14290, 15060, 17148, 21435, 28580, 42870, 85740, 358679, 717358, 1076037, 1434716, 1793395, 2152074, 3586790, 4304148, 5380185, 7173580, 10760370, 21520740]

約数ペア:

[(1, 21520740), (2, 10760370), (3, 7173580), (4, 5380185), (5, 4304148), (6, 3586790), (10, 2152074), (12, 1793395), (15, 1434716), (20, 1076037), (30, 717358), (60, 358679), (251, 85740), (502, 42870), (753, 28580), (1004, 21435), (1255, 17148), (1429, 15060), (1506, 14290), (2510, 8574), (2858, 7530), (3012, 7145), (3765, 5716), (4287, 5020)]