21264720

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{251}}^1\times {\mathrm{353}}^1$

素因数の和:620

約数の個数: 80

約数和(自身を含む): 66370752

約数和(自身を除く): 45106032

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240, 251, 353, 502, 706, 753, 1004, 1059, 1255, 1412, 1506, 1765, 2008, 2118, 2510, 2824, 3012, 3530, 3765, 4016, 4236, 5020, 5295, 5648, 6024, 7060, 7530, 8472, 10040, 10590, 12048, 14120, 15060, 16944, 20080, 21180, 28240, 30120, 42360, 60240, 84720, 88603, 177206, 265809, 354412, 443015, 531618, 708824, 886030, 1063236, 1329045, 1417648, 1772060, 2126472, 2658090, 3544120, 4252944, 5316180, 7088240, 10632360, 21264720]

約数ペア:

[(1, 21264720), (2, 10632360), (3, 7088240), (4, 5316180), (5, 4252944), (6, 3544120), (8, 2658090), (10, 2126472), (12, 1772060), (15, 1417648), (16, 1329045), (20, 1063236), (24, 886030), (30, 708824), (40, 531618), (48, 443015), (60, 354412), (80, 265809), (120, 177206), (240, 88603), (251, 84720), (353, 60240), (502, 42360), (706, 30120), (753, 28240), (1004, 21180), (1059, 20080), (1255, 16944), (1412, 15060), (1506, 14120), (1765, 12048), (2008, 10590), (2118, 10040), (2510, 8472), (2824, 7530), (3012, 7060), (3530, 6024), (3765, 5648), (4016, 5295), (4236, 5020)]