20921820

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{2221}}^1$

素因数の和:2390

約数の個数: 48

約数和(自身を含む): 58980768

約数和(自身を除く): 38058948

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 157, 314, 471, 628, 785, 942, 1570, 1884, 2221, 2355, 3140, 4442, 4710, 6663, 8884, 9420, 11105, 13326, 22210, 26652, 33315, 44420, 66630, 133260, 348697, 697394, 1046091, 1394788, 1743485, 2092182, 3486970, 4184364, 5230455, 6973940, 10460910, 20921820]

約数ペア:

[(1, 20921820), (2, 10460910), (3, 6973940), (4, 5230455), (5, 4184364), (6, 3486970), (10, 2092182), (12, 1743485), (15, 1394788), (20, 1046091), (30, 697394), (60, 348697), (157, 133260), (314, 66630), (471, 44420), (628, 33315), (785, 26652), (942, 22210), (1570, 13326), (1884, 11105), (2221, 9420), (2355, 8884), (3140, 6663), (4442, 4710)]