80887900

素因数分解:

$2^2\times 5^2\times {\mathrm{499}}^1\times {\mathrm{1621}}^1$

素因数の和:2134

約数の個数: 36

約数和(自身を含む): 175987000

約数和(自身を除く): 95099100

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 499, 998, 1621, 1996, 2495, 3242, 4990, 6484, 8105, 9980, 12475, 16210, 24950, 32420, 40525, 49900, 81050, 162100, 808879, 1617758, 3235516, 4044395, 8088790, 16177580, 20221975, 40443950, 80887900]

約数ペア:

[(1, 80887900), (2, 40443950), (4, 20221975), (5, 16177580), (10, 8088790), (20, 4044395), (25, 3235516), (50, 1617758), (100, 808879), (499, 162100), (998, 81050), (1621, 49900), (1996, 40525), (2495, 32420), (3242, 24950), (4990, 16210), (6484, 12475), (8105, 9980)]