648405

素因数分解:

$3^4\times 5^1\times {\mathrm{1601}}^1$

素因数の和:1618

約数の個数: 20

約数和(自身を含む): 1163052

約数和(自身を除く): 514647

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 1601, 4803, 8005, 14409, 24015, 43227, 72045, 129681, 216135, 648405]

約数ペア:

[(1, 648405), (3, 216135), (5, 129681), (9, 72045), (15, 43227), (27, 24015), (45, 14409), (81, 8005), (135, 4803), (405, 1601)]