18716840

素因数分解:

$2^3\times 5^1\times {\mathrm{293}}^1\times {\mathrm{1597}}^1$

素因数の和:1901

約数の個数: 32

約数和(自身を含む): 42283080

約数和(自身を除く): 23566240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 293, 586, 1172, 1465, 1597, 2344, 2930, 3194, 5860, 6388, 7985, 11720, 12776, 15970, 31940, 63880, 467921, 935842, 1871684, 2339605, 3743368, 4679210, 9358420, 18716840]

約数ペア:

[(1, 18716840), (2, 9358420), (4, 4679210), (5, 3743368), (8, 2339605), (10, 1871684), (20, 935842), (40, 467921), (293, 63880), (586, 31940), (1172, 15970), (1465, 12776), (1597, 11720), (2344, 7985), (2930, 6388), (3194, 5860)]