21810620

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{149}}^1\times {\mathrm{563}}^1$

素因数の和:734

約数の個数: 48

約数和(自身を含む): 49744800

約数和(自身を除く): 27934180

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 149, 260, 298, 563, 596, 745, 1126, 1490, 1937, 2252, 2815, 2980, 3874, 5630, 7319, 7748, 9685, 11260, 14638, 19370, 29276, 36595, 38740, 73190, 83887, 146380, 167774, 335548, 419435, 838870, 1090531, 1677740, 2181062, 4362124, 5452655, 10905310, 21810620]

約数ペア:

[(1, 21810620), (2, 10905310), (4, 5452655), (5, 4362124), (10, 2181062), (13, 1677740), (20, 1090531), (26, 838870), (52, 419435), (65, 335548), (130, 167774), (149, 146380), (260, 83887), (298, 73190), (563, 38740), (596, 36595), (745, 29276), (1126, 19370), (1490, 14638), (1937, 11260), (2252, 9685), (2815, 7748), (2980, 7319), (3874, 5630)]