18716620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71987}}^1$

素因数の和:72009

約数の個数: 24

約数和(自身を含む): 42328944

約数和(自身を除く): 23612324

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 71987, 143974, 287948, 359935, 719870, 935831, 1439740, 1871662, 3743324, 4679155, 9358310, 18716620]

約数ペア:

[(1, 18716620), (2, 9358310), (4, 4679155), (5, 3743324), (10, 1871662), (13, 1439740), (20, 935831), (26, 719870), (52, 359935), (65, 287948), (130, 143974), (260, 71987)]