20976980

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{599}}^1$

素因数の和:728

約数の個数: 48

約数和(自身を含む): 47174400

約数和(自身を除く): 26197420

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 103, 170, 206, 340, 412, 515, 599, 1030, 1198, 1751, 2060, 2396, 2995, 3502, 5990, 7004, 8755, 10183, 11980, 17510, 20366, 35020, 40732, 50915, 61697, 101830, 123394, 203660, 246788, 308485, 616970, 1048849, 1233940, 2097698, 4195396, 5244245, 10488490, 20976980]

約数ペア:

[(1, 20976980), (2, 10488490), (4, 5244245), (5, 4195396), (10, 2097698), (17, 1233940), (20, 1048849), (34, 616970), (68, 308485), (85, 246788), (103, 203660), (170, 123394), (206, 101830), (340, 61697), (412, 50915), (515, 40732), (599, 35020), (1030, 20366), (1198, 17510), (1751, 11980), (2060, 10183), (2396, 8755), (2995, 7004), (3502, 5990)]