19800840

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{157}}^1\times {\mathrm{1051}}^1$

素因数の和:1222

約数の個数: 64

約数和(自身を含む): 59837760

約数和(自身を除く): 40036920

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120, 157, 314, 471, 628, 785, 942, 1051, 1256, 1570, 1884, 2102, 2355, 3140, 3153, 3768, 4204, 4710, 5255, 6280, 6306, 8408, 9420, 10510, 12612, 15765, 18840, 21020, 25224, 31530, 42040, 63060, 126120, 165007, 330014, 495021, 660028, 825035, 990042, 1320056, 1650070, 1980084, 2475105, 3300140, 3960168, 4950210, 6600280, 9900420, 19800840]

約数ペア:

[(1, 19800840), (2, 9900420), (3, 6600280), (4, 4950210), (5, 3960168), (6, 3300140), (8, 2475105), (10, 1980084), (12, 1650070), (15, 1320056), (20, 990042), (24, 825035), (30, 660028), (40, 495021), (60, 330014), (120, 165007), (157, 126120), (314, 63060), (471, 42040), (628, 31530), (785, 25224), (942, 21020), (1051, 18840), (1256, 15765), (1570, 12612), (1884, 10510), (2102, 9420), (2355, 8408), (3140, 6306), (3153, 6280), (3768, 5255), (4204, 4710)]