28004977

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{101}}^1\times {\mathrm{277}}^1$

素因数の和:409

約数の個数: 32

約数和(自身を含む): 38110464

約数和(自身を除く): 10105487

約数列:

[1, 7, 11, 13, 77, 91, 101, 143, 277, 707, 1001, 1111, 1313, 1939, 3047, 3601, 7777, 9191, 14443, 21329, 25207, 27977, 39611, 101101, 195839, 277277, 307747, 363701, 2154229, 2545907, 4000711, 28004977]

約数ペア:

[(1, 28004977), (7, 4000711), (11, 2545907), (13, 2154229), (77, 363701), (91, 307747), (101, 277277), (143, 195839), (277, 101101), (707, 39611), (1001, 27977), (1111, 25207), (1313, 21329), (1939, 14443), (3047, 9191), (3601, 7777)]