21531503

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{107}}^1$

素因数の和:239

約数の個数: 32

約数和(自身を含む): 27993600

約数和(自身を除く): 6462097

約数列:

[1, 7, 17, 19, 89, 107, 119, 133, 323, 623, 749, 1513, 1691, 1819, 2033, 2261, 9523, 10591, 11837, 12733, 14231, 28747, 34561, 66661, 161891, 180937, 201229, 241927, 1133237, 1266559, 3075929, 21531503]

約数ペア:

[(1, 21531503), (7, 3075929), (17, 1266559), (19, 1133237), (89, 241927), (107, 201229), (119, 180937), (133, 161891), (323, 66661), (623, 34561), (749, 28747), (1513, 14231), (1691, 12733), (1819, 11837), (2033, 10591), (2261, 9523)]