21490480

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{24421}}^1$

素因数の和:24445

約数の個数: 40

約数和(自身を含む): 54509904

約数和(自身を除く): 33019424

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 40, 44, 55, 80, 88, 110, 176, 220, 440, 880, 24421, 48842, 97684, 122105, 195368, 244210, 268631, 390736, 488420, 537262, 976840, 1074524, 1343155, 1953680, 2149048, 2686310, 4298096, 5372620, 10745240, 21490480]

約数ペア:

[(1, 21490480), (2, 10745240), (4, 5372620), (5, 4298096), (8, 2686310), (10, 2149048), (11, 1953680), (16, 1343155), (20, 1074524), (22, 976840), (40, 537262), (44, 488420), (55, 390736), (80, 268631), (88, 244210), (110, 195368), (176, 122105), (220, 97684), (440, 48842), (880, 24421)]