21187845

素因数分解:

$3^3\times 5^1\times 7^2\times {\mathrm{3203}}^1$

素因数の和:3231

約数の個数: 48

約数和(自身を含む): 43830720

約数和(自身を除く): 22642875

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 49, 63, 105, 135, 147, 189, 245, 315, 441, 735, 945, 1323, 2205, 3203, 6615, 9609, 16015, 22421, 28827, 48045, 67263, 86481, 112105, 144135, 156947, 201789, 336315, 432405, 470841, 605367, 784735, 1008945, 1412523, 2354205, 3026835, 4237569, 7062615, 21187845]

約数ペア:

[(1, 21187845), (3, 7062615), (5, 4237569), (7, 3026835), (9, 2354205), (15, 1412523), (21, 1008945), (27, 784735), (35, 605367), (45, 470841), (49, 432405), (63, 336315), (105, 201789), (135, 156947), (147, 144135), (189, 112105), (245, 86481), (315, 67263), (441, 48045), (735, 28827), (945, 22421), (1323, 16015), (2205, 9609), (3203, 6615)]