20986695

素因数分解:

$3^5\times 5^1\times {\mathrm{23}}^1\times {\mathrm{751}}^1$

素因数の和:794

約数の個数: 48

約数和(自身を含む): 39416832

約数和(自身を除く): 18430137

約数列:

[1, 3, 5, 9, 15, 23, 27, 45, 69, 81, 115, 135, 207, 243, 345, 405, 621, 751, 1035, 1215, 1863, 2253, 3105, 3755, 5589, 6759, 9315, 11265, 17273, 20277, 27945, 33795, 51819, 60831, 86365, 101385, 155457, 182493, 259095, 304155, 466371, 777285, 912465, 1399113, 2331855, 4197339, 6995565, 20986695]

約数ペア:

[(1, 20986695), (3, 6995565), (5, 4197339), (9, 2331855), (15, 1399113), (23, 912465), (27, 777285), (45, 466371), (69, 304155), (81, 259095), (115, 182493), (135, 155457), (207, 101385), (243, 86365), (345, 60831), (405, 51819), (621, 33795), (751, 27945), (1035, 20277), (1215, 17273), (1863, 11265), (2253, 9315), (3105, 6759), (3755, 5589)]