21307987

素因数分解:

${\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{1609}}^1$

素因数の和:1686

約数の個数: 16

約数和(自身を含む): 24343200

約数和(自身を除く): 3035213

約数列:

[1, 17, 19, 41, 323, 697, 779, 1609, 13243, 27353, 30571, 65969, 519707, 1121473, 1253411, 21307987]

約数ペア:

[(1, 21307987), (17, 1253411), (19, 1121473), (41, 519707), (323, 65969), (697, 30571), (779, 27353), (1609, 13243)]