28354820

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{8389}}^1$

素因数の和:8424

約数の個数: 36

約数和(自身を含む): 64485540

約数和(自身を除く): 36130720

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 169, 260, 338, 676, 845, 1690, 3380, 8389, 16778, 33556, 41945, 83890, 109057, 167780, 218114, 436228, 545285, 1090570, 1417741, 2181140, 2835482, 5670964, 7088705, 14177410, 28354820]

約数ペア:

[(1, 28354820), (2, 14177410), (4, 7088705), (5, 5670964), (10, 2835482), (13, 2181140), (20, 1417741), (26, 1090570), (52, 545285), (65, 436228), (130, 218114), (169, 167780), (260, 109057), (338, 83890), (676, 41945), (845, 33556), (1690, 16778), (3380, 8389)]