20385378

素因数分解:

$2^1\times 3^3\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{409}}^1$

素因数の和:504

約数の個数: 64

約数和(自身を含む): 49593600

約数和(自身を除く): 29208222

約数列:

[1, 2, 3, 6, 9, 13, 18, 26, 27, 39, 54, 71, 78, 117, 142, 213, 234, 351, 409, 426, 639, 702, 818, 923, 1227, 1278, 1846, 1917, 2454, 2769, 3681, 3834, 5317, 5538, 7362, 8307, 10634, 11043, 15951, 16614, 22086, 24921, 29039, 31902, 47853, 49842, 58078, 87117, 95706, 143559, 174234, 261351, 287118, 377507, 522702, 755014, 784053, 1132521, 1568106, 2265042, 3397563, 6795126, 10192689, 20385378]

約数ペア:

[(1, 20385378), (2, 10192689), (3, 6795126), (6, 3397563), (9, 2265042), (13, 1568106), (18, 1132521), (26, 784053), (27, 755014), (39, 522702), (54, 377507), (71, 287118), (78, 261351), (117, 174234), (142, 143559), (213, 95706), (234, 87117), (351, 58078), (409, 49842), (426, 47853), (639, 31902), (702, 29039), (818, 24921), (923, 22086), (1227, 16614), (1278, 15951), (1846, 11043), (1917, 10634), (2454, 8307), (2769, 7362), (3681, 5538), (3834, 5317)]