21978459

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{14281}}^1$

素因数の和:14312

約数の個数: 20

約数和(自身を含む): 34562440

約数和(自身を除く): 12583981

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 14281, 42843, 128529, 271339, 385587, 814017, 1156761, 2442051, 7326153, 21978459]

約数ペア:

[(1, 21978459), (3, 7326153), (9, 2442051), (19, 1156761), (27, 814017), (57, 385587), (81, 271339), (171, 128529), (513, 42843), (1539, 14281)]