19404765

素因数分解:

$3^5\times 5^1\times {\mathrm{15971}}^1$

素因数の和:15991

約数の個数: 24

約数和(自身を含む): 34882848

約数和(自身を除く): 15478083

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 15971, 47913, 79855, 143739, 239565, 431217, 718695, 1293651, 2156085, 3880953, 6468255, 19404765]

約数ペア:

[(1, 19404765), (3, 6468255), (5, 3880953), (9, 2156085), (15, 1293651), (27, 718695), (45, 431217), (81, 239565), (135, 143739), (243, 79855), (405, 47913), (1215, 15971)]