20619765

素因数分解:

$3^6\times 5^1\times {\mathrm{5657}}^1$

素因数の和:5680

約数の個数: 28

約数和(自身を含む): 37105164

約数和(自身を除く): 16485399

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 729, 1215, 3645, 5657, 16971, 28285, 50913, 84855, 152739, 254565, 458217, 763695, 1374651, 2291085, 4123953, 6873255, 20619765]

約数ペア:

[(1, 20619765), (3, 6873255), (5, 4123953), (9, 2291085), (15, 1374651), (27, 763695), (45, 458217), (81, 254565), (135, 152739), (243, 84855), (405, 50913), (729, 28285), (1215, 16971), (3645, 5657)]