21243970

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{97}}^1\times {\mathrm{181}}^1$

素因数の和:307

約数の個数: 48

約数和(自身を含む): 42699384

約数和(自身を除く): 21455414

約数列:

[1, 2, 5, 10, 11, 22, 55, 97, 110, 121, 181, 194, 242, 362, 485, 605, 905, 970, 1067, 1210, 1810, 1991, 2134, 3982, 5335, 9955, 10670, 11737, 17557, 19910, 21901, 23474, 35114, 43802, 58685, 87785, 109505, 117370, 175570, 193127, 219010, 386254, 965635, 1931270, 2124397, 4248794, 10621985, 21243970]

約数ペア:

[(1, 21243970), (2, 10621985), (5, 4248794), (10, 2124397), (11, 1931270), (22, 965635), (55, 386254), (97, 219010), (110, 193127), (121, 175570), (181, 117370), (194, 109505), (242, 87785), (362, 58685), (485, 43802), (605, 35114), (905, 23474), (970, 21901), (1067, 19910), (1210, 17557), (1810, 11737), (1991, 10670), (2134, 9955), (3982, 5335)]