648700

素因数分解:

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

素因数の和:526

約数の個数: 36

約数和(自身を含む): 1519000

約数和(自身を除く): 870300

約数列:

[1, 2, 4, 5, 10, 13, 20, 25, 26, 50, 52, 65, 100, 130, 260, 325, 499, 650, 998, 1300, 1996, 2495, 4990, 6487, 9980, 12475, 12974, 24950, 25948, 32435, 49900, 64870, 129740, 162175, 324350, 648700]

約数ペア:

[(1, 648700), (2, 324350), (4, 162175), (5, 129740), (10, 64870), (13, 49900), (20, 32435), (25, 25948), (26, 24950), (50, 12974), (52, 12475), (65, 9980), (100, 6487), (130, 4990), (260, 2495), (325, 1996), (499, 1300), (650, 998)]