21651980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{29}}^1\times {\mathrm{5333}}^1$

素因数の和:5378

約数の個数: 48

約数和(自身を含む): 53766720

約数和(自身を除く): 32114740

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 58, 70, 116, 140, 145, 203, 290, 406, 580, 812, 1015, 2030, 4060, 5333, 10666, 21332, 26665, 37331, 53330, 74662, 106660, 149324, 154657, 186655, 309314, 373310, 618628, 746620, 773285, 1082599, 1546570, 2165198, 3093140, 4330396, 5412995, 10825990, 21651980]

約数ペア:

[(1, 21651980), (2, 10825990), (4, 5412995), (5, 4330396), (7, 3093140), (10, 2165198), (14, 1546570), (20, 1082599), (28, 773285), (29, 746620), (35, 618628), (58, 373310), (70, 309314), (116, 186655), (140, 154657), (145, 149324), (203, 106660), (290, 74662), (406, 53330), (580, 37331), (812, 26665), (1015, 21332), (2030, 10666), (4060, 5333)]