21038212

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{31}}^2\times {\mathrm{421}}^1$

素因数の和:500

約数の個数: 36

約数和(自身を含む): 41066508

約数和(自身を除く): 20028296

約数列:

[1, 2, 4, 13, 26, 31, 52, 62, 124, 403, 421, 806, 842, 961, 1612, 1684, 1922, 3844, 5473, 10946, 12493, 13051, 21892, 24986, 26102, 49972, 52204, 169663, 339326, 404581, 678652, 809162, 1618324, 5259553, 10519106, 21038212]

約数ペア:

[(1, 21038212), (2, 10519106), (4, 5259553), (13, 1618324), (26, 809162), (31, 678652), (52, 404581), (62, 339326), (124, 169663), (403, 52204), (421, 49972), (806, 26102), (842, 24986), (961, 21892), (1612, 13051), (1684, 12493), (1922, 10946), (3844, 5473)]