21220472

素因数分解:

$2^3\times 7^1\times {\mathrm{13}}^1\times {\mathrm{103}}^1\times {\mathrm{283}}^1$

素因数の和:412

約数の個数: 64

約数和(自身を含む): 49620480

約数和(自身を除く): 28400008

約数列:

[1, 2, 4, 7, 8, 13, 14, 26, 28, 52, 56, 91, 103, 104, 182, 206, 283, 364, 412, 566, 721, 728, 824, 1132, 1339, 1442, 1981, 2264, 2678, 2884, 3679, 3962, 5356, 5768, 7358, 7924, 9373, 10712, 14716, 15848, 18746, 25753, 29149, 29432, 37492, 51506, 58298, 74984, 103012, 116596, 204043, 206024, 233192, 378937, 408086, 757874, 816172, 1515748, 1632344, 2652559, 3031496, 5305118, 10610236, 21220472]

約数ペア:

[(1, 21220472), (2, 10610236), (4, 5305118), (7, 3031496), (8, 2652559), (13, 1632344), (14, 1515748), (26, 816172), (28, 757874), (52, 408086), (56, 378937), (91, 233192), (103, 206024), (104, 204043), (182, 116596), (206, 103012), (283, 74984), (364, 58298), (412, 51506), (566, 37492), (721, 29432), (728, 29149), (824, 25753), (1132, 18746), (1339, 15848), (1442, 14716), (1981, 10712), (2264, 9373), (2678, 7924), (2884, 7358), (3679, 5768), (3962, 5356)]