21890319

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{151}}^1\times {\mathrm{191}}^1$

素因数の和:379

約数の個数: 32

約数和(自身を含む): 33619968

約数和(自身を除く): 11729649

約数列:

[1, 3, 11, 23, 33, 69, 151, 191, 253, 453, 573, 759, 1661, 2101, 3473, 4393, 4983, 6303, 10419, 13179, 28841, 38203, 48323, 86523, 114609, 144969, 317251, 663343, 951753, 1990029, 7296773, 21890319]

約数ペア:

[(1, 21890319), (3, 7296773), (11, 1990029), (23, 951753), (33, 663343), (69, 317251), (151, 144969), (191, 114609), (253, 86523), (453, 48323), (573, 38203), (759, 28841), (1661, 13179), (2101, 10419), (3473, 6303), (4393, 4983)]