21877479

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{397}}^1$

素因数の和:576

約数の個数: 32

約数和(自身を含む): 35215040

約数和(自身を除く): 13337561

約数列:

[1, 3, 9, 13, 27, 39, 117, 157, 351, 397, 471, 1191, 1413, 2041, 3573, 4239, 5161, 6123, 10719, 15483, 18369, 46449, 55107, 62329, 139347, 186987, 560961, 810277, 1682883, 2430831, 7292493, 21877479]

約数ペア:

[(1, 21877479), (3, 7292493), (9, 2430831), (13, 1682883), (27, 810277), (39, 560961), (117, 186987), (157, 139347), (351, 62329), (397, 55107), (471, 46449), (1191, 18369), (1413, 15483), (2041, 10719), (3573, 6123), (4239, 5161)]