20806660

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{331}}^1\times {\mathrm{449}}^1$

素因数の和:796

約数の個数: 48

約数和(自身を含む): 50198400

約数和(自身を除く): 29391740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 331, 449, 662, 898, 1324, 1655, 1796, 2245, 2317, 3143, 3310, 4490, 4634, 6286, 6620, 8980, 9268, 11585, 12572, 15715, 23170, 31430, 46340, 62860, 148619, 297238, 594476, 743095, 1040333, 1486190, 2080666, 2972380, 4161332, 5201665, 10403330, 20806660]

約数ペア:

[(1, 20806660), (2, 10403330), (4, 5201665), (5, 4161332), (7, 2972380), (10, 2080666), (14, 1486190), (20, 1040333), (28, 743095), (35, 594476), (70, 297238), (140, 148619), (331, 62860), (449, 46340), (662, 31430), (898, 23170), (1324, 15715), (1655, 12572), (1796, 11585), (2245, 9268), (2317, 8980), (3143, 6620), (3310, 6286), (4490, 4634)]