21657790

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{2557}}^1$

素因数の和:2593

約数の個数: 48

約数和(自身を含む): 48990816

約数和(自身を除く): 27333026

約数列:

[1, 2, 5, 7, 10, 11, 14, 22, 35, 55, 70, 77, 110, 121, 154, 242, 385, 605, 770, 847, 1210, 1694, 2557, 4235, 5114, 8470, 12785, 17899, 25570, 28127, 35798, 56254, 89495, 140635, 178990, 196889, 281270, 309397, 393778, 618794, 984445, 1546985, 1968890, 2165779, 3093970, 4331558, 10828895, 21657790]

約数ペア:

[(1, 21657790), (2, 10828895), (5, 4331558), (7, 3093970), (10, 2165779), (11, 1968890), (14, 1546985), (22, 984445), (35, 618794), (55, 393778), (70, 309397), (77, 281270), (110, 196889), (121, 178990), (154, 140635), (242, 89495), (385, 56254), (605, 35798), (770, 28127), (847, 25570), (1210, 17899), (1694, 12785), (2557, 8470), (4235, 5114)]