18978165

素因数分解:

$3^3\times 5^1\times {\mathrm{257}}^1\times {\mathrm{547}}^1$

素因数の和:818

約数の個数: 32

約数和(自身を含む): 33932160

約数和(自身を除く): 14953995

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 257, 547, 771, 1285, 1641, 2313, 2735, 3855, 4923, 6939, 8205, 11565, 14769, 24615, 34695, 73845, 140579, 421737, 702895, 1265211, 2108685, 3795633, 6326055, 18978165]

約数ペア:

[(1, 18978165), (3, 6326055), (5, 3795633), (9, 2108685), (15, 1265211), (27, 702895), (45, 421737), (135, 140579), (257, 73845), (547, 34695), (771, 24615), (1285, 14769), (1641, 11565), (2313, 8205), (2735, 6939), (3855, 4923)]