12993500

素因数分解:

$2^2\times 5^3\times {\mathrm{13}}^1\times {\mathrm{1999}}^1$

素因数の和:2031

約数の個数: 48

約数和(自身を含む): 30576000

約数和(自身を除く): 17582500

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 125, 130, 250, 260, 325, 500, 650, 1300, 1625, 1999, 3250, 3998, 6500, 7996, 9995, 19990, 25987, 39980, 49975, 51974, 99950, 103948, 129935, 199900, 249875, 259870, 499750, 519740, 649675, 999500, 1299350, 2598700, 3248375, 6496750, 12993500]

約数ペア:

[(1, 12993500), (2, 6496750), (4, 3248375), (5, 2598700), (10, 1299350), (13, 999500), (20, 649675), (25, 519740), (26, 499750), (50, 259870), (52, 249875), (65, 199900), (100, 129935), (125, 103948), (130, 99950), (250, 51974), (260, 49975), (325, 39980), (500, 25987), (650, 19990), (1300, 9995), (1625, 7996), (1999, 6500), (3250, 3998)]