20790

素因数分解:

$2^1\times 3^3\times 5^1\times 7^1\times {\mathrm{11}}^1$

素因数の和:34

約数の個数: 64

約数和(自身を含む): 69120

約数和(自身を除く): 48330

約数列:

[1, 2, 3, 5, 6, 7, 9, 10, 11, 14, 15, 18, 21, 22, 27, 30, 33, 35, 42, 45, 54, 55, 63, 66, 70, 77, 90, 99, 105, 110, 126, 135, 154, 165, 189, 198, 210, 231, 270, 297, 315, 330, 378, 385, 462, 495, 594, 630, 693, 770, 945, 990, 1155, 1386, 1485, 1890, 2079, 2310, 2970, 3465, 4158, 6930, 10395, 20790]

約数ペア:

[(1, 20790), (2, 10395), (3, 6930), (5, 4158), (6, 3465), (7, 2970), (9, 2310), (10, 2079), (11, 1890), (14, 1485), (15, 1386), (18, 1155), (21, 990), (22, 945), (27, 770), (30, 693), (33, 630), (35, 594), (42, 495), (45, 462), (54, 385), (55, 378), (63, 330), (66, 315), (70, 297), (77, 270), (90, 231), (99, 210), (105, 198), (110, 189), (126, 165), (135, 154)]