21771880

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{281}}^1$

素因数の和:454

約数の個数: 64

約数和(自身を含む): 53298000

約数和(自身を除く): 31526120

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 40, 52, 65, 104, 130, 149, 260, 281, 298, 520, 562, 596, 745, 1124, 1192, 1405, 1490, 1937, 2248, 2810, 2980, 3653, 3874, 5620, 5960, 7306, 7748, 9685, 11240, 14612, 15496, 18265, 19370, 29224, 36530, 38740, 41869, 73060, 77480, 83738, 146120, 167476, 209345, 334952, 418690, 544297, 837380, 1088594, 1674760, 2177188, 2721485, 4354376, 5442970, 10885940, 21771880]

約数ペア:

[(1, 21771880), (2, 10885940), (4, 5442970), (5, 4354376), (8, 2721485), (10, 2177188), (13, 1674760), (20, 1088594), (26, 837380), (40, 544297), (52, 418690), (65, 334952), (104, 209345), (130, 167476), (149, 146120), (260, 83738), (281, 77480), (298, 73060), (520, 41869), (562, 38740), (596, 36530), (745, 29224), (1124, 19370), (1192, 18265), (1405, 15496), (1490, 14612), (1937, 11240), (2248, 9685), (2810, 7748), (2980, 7306), (3653, 5960), (3874, 5620)]