19871480

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{6997}}^1$

素因数の和:7079

約数の個数: 32

約数和(自身を含む): 45347040

約数和(自身を除く): 25475560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 6997, 13994, 27988, 34985, 55976, 69970, 139940, 279880, 496787, 993574, 1987148, 2483935, 3974296, 4967870, 9935740, 19871480]

約数ペア:

[(1, 19871480), (2, 9935740), (4, 4967870), (5, 3974296), (8, 2483935), (10, 1987148), (20, 993574), (40, 496787), (71, 279880), (142, 139940), (284, 69970), (355, 55976), (568, 34985), (710, 27988), (1420, 13994), (2840, 6997)]