20972007

素因数分解:

$3^3\times 7^1\times {\mathrm{37}}^1\times {\mathrm{2999}}^1$

素因数の和:3052

約数の個数: 32

約数和(自身を含む): 36480000

約数和(自身を除く): 15507993

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 111, 189, 259, 333, 777, 999, 2331, 2999, 6993, 8997, 20993, 26991, 62979, 80973, 110963, 188937, 332889, 566811, 776741, 998667, 2330223, 2996001, 6990669, 20972007]

約数ペア:

[(1, 20972007), (3, 6990669), (7, 2996001), (9, 2330223), (21, 998667), (27, 776741), (37, 566811), (63, 332889), (111, 188937), (189, 110963), (259, 80973), (333, 62979), (777, 26991), (999, 20993), (2331, 8997), (2999, 6993)]