21118804

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 46539360

約数和(自身を除く): 25420556

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 53, 76, 98, 106, 107, 133, 196, 212, 214, 266, 371, 428, 532, 742, 749, 931, 1007, 1484, 1498, 1862, 2014, 2033, 2597, 2996, 3724, 4028, 4066, 5194, 5243, 5671, 7049, 8132, 10388, 10486, 11342, 14098, 14231, 20972, 22684, 28196, 28462, 39697, 49343, 56924, 79394, 98686, 99617, 107749, 158788, 197372, 199234, 215498, 277879, 398468, 430996, 555758, 754243, 1111516, 1508486, 3016972, 5279701, 10559402, 21118804]

約数ペア:

[(1, 21118804), (2, 10559402), (4, 5279701), (7, 3016972), (14, 1508486), (19, 1111516), (28, 754243), (38, 555758), (49, 430996), (53, 398468), (76, 277879), (98, 215498), (106, 199234), (107, 197372), (133, 158788), (196, 107749), (212, 99617), (214, 98686), (266, 79394), (371, 56924), (428, 49343), (532, 39697), (742, 28462), (749, 28196), (931, 22684), (1007, 20972), (1484, 14231), (1498, 14098), (1862, 11342), (2014, 10486), (2033, 10388), (2597, 8132), (2996, 7049), (3724, 5671), (4028, 5243), (4066, 5194)]