28721559

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{151}}^1$

素因数の和:291

約数の個数: 32

約数和(自身を含む): 42024960

約数和(自身を除く): 13303401

約数列:

[1, 3, 19, 47, 57, 71, 141, 151, 213, 453, 893, 1349, 2679, 2869, 3337, 4047, 7097, 8607, 10011, 10721, 21291, 32163, 63403, 134843, 190209, 203699, 404529, 503887, 611097, 1511661, 9573853, 28721559]

約数ペア:

[(1, 28721559), (3, 9573853), (19, 1511661), (47, 611097), (57, 503887), (71, 404529), (141, 203699), (151, 190209), (213, 134843), (453, 63403), (893, 32163), (1349, 21291), (2679, 10721), (2869, 10011), (3337, 8607), (4047, 7097)]