19984328

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{97}}^1\times {\mathrm{283}}^1$

素因数の和:406

約数の個数: 64

約数和(自身を含む): 46757760

約数和(自身を除く): 26773432

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 97, 104, 182, 194, 283, 364, 388, 566, 679, 728, 776, 1132, 1261, 1358, 1981, 2264, 2522, 2716, 3679, 3962, 5044, 5432, 7358, 7924, 8827, 10088, 14716, 15848, 17654, 25753, 27451, 29432, 35308, 51506, 54902, 70616, 103012, 109804, 192157, 206024, 219608, 356863, 384314, 713726, 768628, 1427452, 1537256, 2498041, 2854904, 4996082, 9992164, 19984328]

約数ペア:

[(1, 19984328), (2, 9992164), (4, 4996082), (7, 2854904), (8, 2498041), (13, 1537256), (14, 1427452), (26, 768628), (28, 713726), (52, 384314), (56, 356863), (91, 219608), (97, 206024), (104, 192157), (182, 109804), (194, 103012), (283, 70616), (364, 54902), (388, 51506), (566, 35308), (679, 29432), (728, 27451), (776, 25753), (1132, 17654), (1261, 15848), (1358, 14716), (1981, 10088), (2264, 8827), (2522, 7924), (2716, 7358), (3679, 5432), (3962, 5044)]