21356986

素因数分解:

$2^1\times 7^1\times {\mathrm{53}}^1\times {\mathrm{107}}^1\times {\mathrm{269}}^1$

素因数の和:438

約数の個数: 32

約数和(自身を含む): 37791360

約数和(自身を除く): 16434374

約数列:

[1, 2, 7, 14, 53, 106, 107, 214, 269, 371, 538, 742, 749, 1498, 1883, 3766, 5671, 11342, 14257, 28514, 28783, 39697, 57566, 79394, 99799, 199598, 201481, 402962, 1525499, 3050998, 10678493, 21356986]

約数ペア:

[(1, 21356986), (2, 10678493), (7, 3050998), (14, 1525499), (53, 402962), (106, 201481), (107, 199598), (214, 99799), (269, 79394), (371, 57566), (538, 39697), (742, 28783), (749, 28514), (1498, 14257), (1883, 11342), (3766, 5671)]