21098810

素因数分解:

$2^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{353}}^1$

素因数の和:542

約数の個数: 32

約数和(自身を含む): 39251520

約数和(自身を除く): 18152710

約数列:

[1, 2, 5, 10, 43, 86, 139, 215, 278, 353, 430, 695, 706, 1390, 1765, 3530, 5977, 11954, 15179, 29885, 30358, 49067, 59770, 75895, 98134, 151790, 245335, 490670, 2109881, 4219762, 10549405, 21098810]

約数ペア:

[(1, 21098810), (2, 10549405), (5, 4219762), (10, 2109881), (43, 490670), (86, 245335), (139, 151790), (215, 98134), (278, 75895), (353, 59770), (430, 49067), (695, 30358), (706, 29885), (1390, 15179), (1765, 11954), (3530, 5977)]