28409381

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{281}}^1$

素因数の和:413

約数の個数: 32

約数和(自身を含む): 38658816

約数和(自身を除く): 10249435

約数列:

[1, 7, 11, 13, 77, 91, 101, 143, 281, 707, 1001, 1111, 1313, 1967, 3091, 3653, 7777, 9191, 14443, 21637, 25571, 28381, 40183, 101101, 198667, 281281, 312191, 368953, 2185337, 2582671, 4058483, 28409381]

約数ペア:

[(1, 28409381), (7, 4058483), (11, 2582671), (13, 2185337), (77, 368953), (91, 312191), (101, 281281), (143, 198667), (281, 101101), (707, 40183), (1001, 28381), (1111, 25571), (1313, 21637), (1967, 14443), (3091, 9191), (3653, 7777)]