28291228

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:215

約数の個数: 72

約数和(自身を含む): 62052480

約数和(自身を除く): 33761252

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 71, 76, 98, 107, 133, 142, 196, 214, 266, 284, 428, 497, 532, 749, 931, 994, 1349, 1498, 1862, 1988, 2033, 2698, 2996, 3479, 3724, 4066, 5243, 5396, 6958, 7597, 8132, 9443, 10486, 13916, 14231, 15194, 18886, 20972, 28462, 30388, 37772, 53179, 56924, 66101, 99617, 106358, 132202, 144343, 199234, 212716, 264404, 288686, 372253, 398468, 577372, 744506, 1010401, 1489012, 2020802, 4041604, 7072807, 14145614, 28291228]

約数ペア:

[(1, 28291228), (2, 14145614), (4, 7072807), (7, 4041604), (14, 2020802), (19, 1489012), (28, 1010401), (38, 744506), (49, 577372), (71, 398468), (76, 372253), (98, 288686), (107, 264404), (133, 212716), (142, 199234), (196, 144343), (214, 132202), (266, 106358), (284, 99617), (428, 66101), (497, 56924), (532, 53179), (749, 37772), (931, 30388), (994, 28462), (1349, 20972), (1498, 18886), (1862, 15194), (1988, 14231), (2033, 13916), (2698, 10486), (2996, 9443), (3479, 8132), (3724, 7597), (4066, 6958), (5243, 5396)]