16800000021

素因数分解:

$3^3\times 7^1\times {\mathrm{251}}^1\times {\mathrm{354139}}^1$

素因数の和:354406

約数の個数: 32

約数和(自身を含む): 28557849600

約数和(自身を除く): 11757849579

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 251, 753, 1757, 2259, 5271, 6777, 15813, 47439, 354139, 1062417, 2478973, 3187251, 7436919, 9561753, 22310757, 66932271, 88888889, 266666667, 622222223, 800000001, 1866666669, 2400000003, 5600000007, 16800000021]

約数ペア:

[(1, 16800000021), (3, 5600000007), (7, 2400000003), (9, 1866666669), (21, 800000001), (27, 622222223), (63, 266666667), (189, 88888889), (251, 66932271), (753, 22310757), (1757, 9561753), (2259, 7436919), (5271, 3187251), (6777, 2478973), (15813, 1062417), (47439, 354139)]