20991276

素因数分解:

$2^2\times 3^2\times {\mathrm{19}}^1\times {\mathrm{30689}}^1$

素因数の和:30718

約数の個数: 36

約数和(自身を含む): 55855800

約数和(自身を除く): 34864524

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 19, 36, 38, 57, 76, 114, 171, 228, 342, 684, 30689, 61378, 92067, 122756, 184134, 276201, 368268, 552402, 583091, 1104804, 1166182, 1749273, 2332364, 3498546, 5247819, 6997092, 10495638, 20991276]

約数ペア:

[(1, 20991276), (2, 10495638), (3, 6997092), (4, 5247819), (6, 3498546), (9, 2332364), (12, 1749273), (18, 1166182), (19, 1104804), (36, 583091), (38, 552402), (57, 368268), (76, 276201), (114, 184134), (171, 122756), (228, 92067), (342, 61378), (684, 30689)]