1297400

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{499}}^1$

素因数の和:528

約数の個数: 48

約数和(自身を含む): 3255000

約数和(自身を除く): 1957600

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 200, 260, 325, 499, 520, 650, 998, 1300, 1996, 2495, 2600, 3992, 4990, 6487, 9980, 12475, 12974, 19960, 24950, 25948, 32435, 49900, 51896, 64870, 99800, 129740, 162175, 259480, 324350, 648700, 1297400]

約数ペア:

[(1, 1297400), (2, 648700), (4, 324350), (5, 259480), (8, 162175), (10, 129740), (13, 99800), (20, 64870), (25, 51896), (26, 49900), (40, 32435), (50, 25948), (52, 24950), (65, 19960), (100, 12974), (104, 12475), (130, 9980), (200, 6487), (260, 4990), (325, 3992), (499, 2600), (520, 2495), (650, 1996), (998, 1300)]