640530

素因数分解:

$2^1\times 3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{647}}^1$

素因数の和:671

約数の個数: 48

約数和(自身を含む): 1819584

約数和(自身を除く): 1179054

約数列:

[1, 2, 3, 5, 6, 9, 10, 11, 15, 18, 22, 30, 33, 45, 55, 66, 90, 99, 110, 165, 198, 330, 495, 647, 990, 1294, 1941, 3235, 3882, 5823, 6470, 7117, 9705, 11646, 14234, 19410, 21351, 29115, 35585, 42702, 58230, 64053, 71170, 106755, 128106, 213510, 320265, 640530]

約数ペア:

[(1, 640530), (2, 320265), (3, 213510), (5, 128106), (6, 106755), (9, 71170), (10, 64053), (11, 58230), (15, 42702), (18, 35585), (22, 29115), (30, 21351), (33, 19410), (45, 14234), (55, 11646), (66, 9705), (90, 7117), (99, 6470), (110, 5823), (165, 3882), (198, 3235), (330, 1941), (495, 1294), (647, 990)]