20989935

素因数分解:

$3^4\times 5^1\times {\mathrm{51827}}^1$

素因数の和:51844

約数の個数: 20

約数和(自身を含む): 37627128

約数和(自身を除く): 16637193

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 51827, 155481, 259135, 466443, 777405, 1399329, 2332215, 4197987, 6996645, 20989935]

約数ペア:

[(1, 20989935), (3, 6996645), (5, 4197987), (9, 2332215), (15, 1399329), (27, 777405), (45, 466443), (81, 259135), (135, 155481), (405, 51827)]