18955215

素因数分解:

$3^5\times 5^1\times {\mathrm{15601}}^1$

素因数の和:15621

約数の個数: 24

約数和(自身を含む): 34074768

約数和(自身を除く): 15119553

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 243, 405, 1215, 15601, 46803, 78005, 140409, 234015, 421227, 702045, 1263681, 2106135, 3791043, 6318405, 18955215]

約数ペア:

[(1, 18955215), (3, 6318405), (5, 3791043), (9, 2106135), (15, 1263681), (27, 702045), (45, 421227), (81, 234015), (135, 140409), (243, 78005), (405, 46803), (1215, 15601)]