18918765

素因数分解:

$3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{677}}^1$

素因数の和:720

約数の個数: 48

約数和(自身を含む): 35538048

約数和(自身を除く): 16619283

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 677, 1035, 1215, 1863, 2031, 3105, 3385, 5589, 6093, 9315, 10155, 15571, 18279, 27945, 30465, 46713, 54837, 77855, 91395, 140139, 164511, 233565, 274185, 420417, 700695, 822555, 1261251, 2102085, 3783753, 6306255, 18918765]

約数ペア:

[(1, 18918765), (3, 6306255), (5, 3783753), (9, 2102085), (15, 1261251), (23, 822555), (27, 700695), (45, 420417), (69, 274185), (81, 233565), (115, 164511), (135, 140139), (207, 91395), (243, 77855), (345, 54837), (405, 46713), (621, 30465), (677, 27945), (1035, 18279), (1215, 15571), (1863, 10155), (2031, 9315), (3105, 6093), (3385, 5589)]