20568790

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{89}}^1\times {\mathrm{191}}^1$

素因数の和:309

約数の個数: 48

約数和(自身を含む): 41368320

約数和(自身を除く): 20799530

約数列:

[1, 2, 5, 10, 11, 22, 55, 89, 110, 121, 178, 191, 242, 382, 445, 605, 890, 955, 979, 1210, 1910, 1958, 2101, 4202, 4895, 9790, 10505, 10769, 16999, 21010, 21538, 23111, 33998, 46222, 53845, 84995, 107690, 115555, 169990, 186989, 231110, 373978, 934945, 1869890, 2056879, 4113758, 10284395, 20568790]

約数ペア:

[(1, 20568790), (2, 10284395), (5, 4113758), (10, 2056879), (11, 1869890), (22, 934945), (55, 373978), (89, 231110), (110, 186989), (121, 169990), (178, 115555), (191, 107690), (242, 84995), (382, 53845), (445, 46222), (605, 33998), (890, 23111), (955, 21538), (979, 21010), (1210, 16999), (1910, 10769), (1958, 10505), (2101, 9790), (4202, 4895)]