21661164

素因数分解:

$2^2\times 3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{1999}}^1$

素因数の和:2059

約数の個数: 72

約数和(自身を含む): 64064000

約数和(自身を除く): 42402836

約数列:

[1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 43, 63, 84, 86, 126, 129, 172, 252, 258, 301, 387, 516, 602, 774, 903, 1204, 1548, 1806, 1999, 2709, 3612, 3998, 5418, 5997, 7996, 10836, 11994, 13993, 17991, 23988, 27986, 35982, 41979, 55972, 71964, 83958, 85957, 125937, 167916, 171914, 251874, 257871, 343828, 503748, 515742, 601699, 773613, 1031484, 1203398, 1547226, 1805097, 2406796, 3094452, 3610194, 5415291, 7220388, 10830582, 21661164]

約数ペア:

[(1, 21661164), (2, 10830582), (3, 7220388), (4, 5415291), (6, 3610194), (7, 3094452), (9, 2406796), (12, 1805097), (14, 1547226), (18, 1203398), (21, 1031484), (28, 773613), (36, 601699), (42, 515742), (43, 503748), (63, 343828), (84, 257871), (86, 251874), (126, 171914), (129, 167916), (172, 125937), (252, 85957), (258, 83958), (301, 71964), (387, 55972), (516, 41979), (602, 35982), (774, 27986), (903, 23988), (1204, 17991), (1548, 13993), (1806, 11994), (1999, 10836), (2709, 7996), (3612, 5997), (3998, 5418)]