20803720

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{191}}^1\times {\mathrm{389}}^1$

素因数の和:598

約数の個数: 64

約数和(自身を含む): 53913600

約数和(自身を除く): 33109880

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 191, 280, 382, 389, 764, 778, 955, 1337, 1528, 1556, 1910, 1945, 2674, 2723, 3112, 3820, 3890, 5348, 5446, 6685, 7640, 7780, 10696, 10892, 13370, 13615, 15560, 21784, 26740, 27230, 53480, 54460, 74299, 108920, 148598, 297196, 371495, 520093, 594392, 742990, 1040186, 1485980, 2080372, 2600465, 2971960, 4160744, 5200930, 10401860, 20803720]

約数ペア:

[(1, 20803720), (2, 10401860), (4, 5200930), (5, 4160744), (7, 2971960), (8, 2600465), (10, 2080372), (14, 1485980), (20, 1040186), (28, 742990), (35, 594392), (40, 520093), (56, 371495), (70, 297196), (140, 148598), (191, 108920), (280, 74299), (382, 54460), (389, 53480), (764, 27230), (778, 26740), (955, 21784), (1337, 15560), (1528, 13615), (1556, 13370), (1910, 10892), (1945, 10696), (2674, 7780), (2723, 7640), (3112, 6685), (3820, 5446), (3890, 5348)]