20802740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{139}}^1\times {\mathrm{1069}}^1$

素因数の和:1224

約数の個数: 48

約数和(自身を含む): 50332800

約数和(自身を除く): 29530060

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 139, 140, 278, 556, 695, 973, 1069, 1390, 1946, 2138, 2780, 3892, 4276, 4865, 5345, 7483, 9730, 10690, 14966, 19460, 21380, 29932, 37415, 74830, 148591, 149660, 297182, 594364, 742955, 1040137, 1485910, 2080274, 2971820, 4160548, 5200685, 10401370, 20802740]

約数ペア:

[(1, 20802740), (2, 10401370), (4, 5200685), (5, 4160548), (7, 2971820), (10, 2080274), (14, 1485910), (20, 1040137), (28, 742955), (35, 594364), (70, 297182), (139, 149660), (140, 148591), (278, 74830), (556, 37415), (695, 29932), (973, 21380), (1069, 19460), (1390, 14966), (1946, 10690), (2138, 9730), (2780, 7483), (3892, 5345), (4276, 4865)]