64385000

素因数分解:

$2^3\times 5^4\times {\mathrm{79}}^1\times {\mathrm{163}}^1$

素因数の和:268

約数の個数: 80

約数和(自身を含む): 153700800

約数和(自身を除く): 89315800

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 79, 100, 125, 158, 163, 200, 250, 316, 326, 395, 500, 625, 632, 652, 790, 815, 1000, 1250, 1304, 1580, 1630, 1975, 2500, 3160, 3260, 3950, 4075, 5000, 6520, 7900, 8150, 9875, 12877, 15800, 16300, 19750, 20375, 25754, 32600, 39500, 40750, 49375, 51508, 64385, 79000, 81500, 98750, 101875, 103016, 128770, 163000, 197500, 203750, 257540, 321925, 395000, 407500, 515080, 643850, 815000, 1287700, 1609625, 2575400, 3219250, 6438500, 8048125, 12877000, 16096250, 32192500, 64385000]

約数ペア:

[(1, 64385000), (2, 32192500), (4, 16096250), (5, 12877000), (8, 8048125), (10, 6438500), (20, 3219250), (25, 2575400), (40, 1609625), (50, 1287700), (79, 815000), (100, 643850), (125, 515080), (158, 407500), (163, 395000), (200, 321925), (250, 257540), (316, 203750), (326, 197500), (395, 163000), (500, 128770), (625, 103016), (632, 101875), (652, 98750), (790, 81500), (815, 79000), (1000, 64385), (1250, 51508), (1304, 49375), (1580, 40750), (1630, 39500), (1975, 32600), (2500, 25754), (3160, 20375), (3260, 19750), (3950, 16300), (4075, 15800), (5000, 12877), (6520, 9875), (7900, 8150)]