128959480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{247999}}^1$

素因数の和:248023

約数の個数: 32

約数和(自身を含む): 312480000

約数和(自身を除く): 183520520

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 260, 520, 247999, 495998, 991996, 1239995, 1983992, 2479990, 3223987, 4959980, 6447974, 9919960, 12895948, 16119935, 25791896, 32239870, 64479740, 128959480]

約数ペア:

[(1, 128959480), (2, 64479740), (4, 32239870), (5, 25791896), (8, 16119935), (10, 12895948), (13, 9919960), (20, 6447974), (26, 4959980), (40, 3223987), (52, 2479990), (65, 1983992), (104, 1239995), (130, 991996), (260, 495998), (520, 247999)]