21524140

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{227}}^1\times {\mathrm{431}}^1$

素因数の和:678

約数の個数: 48

約数和(自身を含む): 49641984

約数和(自身を除く): 28117844

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 220, 227, 431, 454, 862, 908, 1135, 1724, 2155, 2270, 2497, 4310, 4540, 4741, 4994, 8620, 9482, 9988, 12485, 18964, 23705, 24970, 47410, 49940, 94820, 97837, 195674, 391348, 489185, 978370, 1076207, 1956740, 2152414, 4304828, 5381035, 10762070, 21524140]

約数ペア:

[(1, 21524140), (2, 10762070), (4, 5381035), (5, 4304828), (10, 2152414), (11, 1956740), (20, 1076207), (22, 978370), (44, 489185), (55, 391348), (110, 195674), (220, 97837), (227, 94820), (431, 49940), (454, 47410), (862, 24970), (908, 23705), (1135, 18964), (1724, 12485), (2155, 9988), (2270, 9482), (2497, 8620), (4310, 4994), (4540, 4741)]