78720255

素因数分解:

$3^4\times 5^1\times {\mathrm{194371}}^1$

素因数の和:194388

約数の個数: 20

約数和(自身を含む): 141114072

約数和(自身を除く): 62393817

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 194371, 583113, 971855, 1749339, 2915565, 5248017, 8746695, 15744051, 26240085, 78720255]

約数ペア:

[(1, 78720255), (3, 26240085), (5, 15744051), (9, 8746695), (15, 5248017), (27, 2915565), (45, 1749339), (81, 971855), (135, 583113), (405, 194371)]