20825721

素因数分解:

$3^3\times 7^1\times {\mathrm{251}}^1\times {\mathrm{439}}^1$

素因数の和:706

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 14655879

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 251, 439, 753, 1317, 1757, 2259, 3073, 3951, 5271, 6777, 9219, 11853, 15813, 27657, 47439, 82971, 110189, 330567, 771323, 991701, 2313969, 2975103, 6941907, 20825721]

約数ペア:

[(1, 20825721), (3, 6941907), (7, 2975103), (9, 2313969), (21, 991701), (27, 771323), (63, 330567), (189, 110189), (251, 82971), (439, 47439), (753, 27657), (1317, 15813), (1757, 11853), (2259, 9219), (3073, 6777), (3951, 5271)]