21390350

素因数分解:

$2^1\times 5^2\times {\mathrm{43}}^1\times {\mathrm{9949}}^1$

素因数の和:10004

約数の個数: 24

約数和(自身を含む): 40715400

約数和(自身を除く): 19325050

約数列:

[1, 2, 5, 10, 25, 43, 50, 86, 215, 430, 1075, 2150, 9949, 19898, 49745, 99490, 248725, 427807, 497450, 855614, 2139035, 4278070, 10695175, 21390350]

約数ペア:

[(1, 21390350), (2, 10695175), (5, 4278070), (10, 2139035), (25, 855614), (43, 497450), (50, 427807), (86, 248725), (215, 99490), (430, 49745), (1075, 19898), (2150, 9949)]