21000658238

素因数分解:

$2^1\times 7^2\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{105407}}^1$

素因数の和:105549

約数の個数: 48

約数和(自身を含む): 38933498880

約数和(自身を除く): 17932840642

約数列:

[1, 2, 7, 14, 19, 38, 49, 98, 107, 133, 214, 266, 749, 931, 1498, 1862, 2033, 4066, 5243, 10486, 14231, 28462, 99617, 105407, 199234, 210814, 737849, 1475698, 2002733, 4005466, 5164943, 10329886, 11278549, 14019131, 22557098, 28038262, 78949843, 98133917, 157899686, 196267834, 214292431, 428584862, 552648901, 1105297802, 1500047017, 3000094034, 10500329119, 21000658238]

約数ペア:

[(1, 21000658238), (2, 10500329119), (7, 3000094034), (14, 1500047017), (19, 1105297802), (38, 552648901), (49, 428584862), (98, 214292431), (107, 196267834), (133, 157899686), (214, 98133917), (266, 78949843), (749, 28038262), (931, 22557098), (1498, 14019131), (1862, 11278549), (2033, 10329886), (4066, 5164943), (5243, 4005466), (10486, 2002733), (14231, 1475698), (28462, 737849), (99617, 210814), (105407, 199234)]