28904421

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{239}}^1\times {\mathrm{443}}^1$

素因数の和:705

約数の個数: 32

約数和(自身を含む): 47738880

約数和(自身を除く): 18834459

約数列:

[1, 3, 7, 13, 21, 39, 91, 239, 273, 443, 717, 1329, 1673, 3101, 3107, 5019, 5759, 9303, 9321, 17277, 21749, 40313, 65247, 105877, 120939, 317631, 741139, 1376401, 2223417, 4129203, 9634807, 28904421]

約数ペア:

[(1, 28904421), (3, 9634807), (7, 4129203), (13, 2223417), (21, 1376401), (39, 741139), (91, 317631), (239, 120939), (273, 105877), (443, 65247), (717, 40313), (1329, 21749), (1673, 17277), (3101, 9321), (3107, 9303), (5019, 5759)]