21285796

素因数分解:

$2^2\times 7^2\times {\mathrm{223}}^1\times {\mathrm{487}}^1$

素因数の和:728

約数の個数: 36

約数和(自身を含む): 43615488

約数和(自身を除く): 22329692

約数列:

[1, 2, 4, 7, 14, 28, 49, 98, 196, 223, 446, 487, 892, 974, 1561, 1948, 3122, 3409, 6244, 6818, 10927, 13636, 21854, 23863, 43708, 47726, 95452, 108601, 217202, 434404, 760207, 1520414, 3040828, 5321449, 10642898, 21285796]

約数ペア:

[(1, 21285796), (2, 10642898), (4, 5321449), (7, 3040828), (14, 1520414), (28, 760207), (49, 434404), (98, 217202), (196, 108601), (223, 95452), (446, 47726), (487, 43708), (892, 23863), (974, 21854), (1561, 13636), (1948, 10927), (3122, 6818), (3409, 6244)]