21285754

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{28687}}^1$

素因数の和:28749

約数の個数: 16

約数和(自身を含む): 37179648

約数和(自身を除く): 15893894

約数列:

[1, 2, 7, 14, 53, 106, 371, 742, 28687, 57374, 200809, 401618, 1520411, 3040822, 10642877, 21285754]

約数ペア:

[(1, 21285754), (2, 10642877), (7, 3040822), (14, 1520411), (53, 401618), (106, 200809), (371, 57374), (742, 28687)]