19219880

素因数分解:

$2^3\times 5^1\times {\mathrm{61}}^1\times {\mathrm{7877}}^1$

素因数の和:7949

約数の個数: 32

約数和(自身を含む): 43959240

約数和(自身を除く): 24739360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 61, 122, 244, 305, 488, 610, 1220, 2440, 7877, 15754, 31508, 39385, 63016, 78770, 157540, 315080, 480497, 960994, 1921988, 2402485, 3843976, 4804970, 9609940, 19219880]

約数ペア:

[(1, 19219880), (2, 9609940), (4, 4804970), (5, 3843976), (8, 2402485), (10, 1921988), (20, 960994), (40, 480497), (61, 315080), (122, 157540), (244, 78770), (305, 63016), (488, 39385), (610, 31508), (1220, 15754), (2440, 7877)]