21311888

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102461}}^1$

素因数の和:102482

約数の個数: 20

約数和(自身を含む): 44468508

約数和(自身を除く): 23156620

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102461, 204922, 409844, 819688, 1331993, 1639376, 2663986, 5327972, 10655944, 21311888]

約数ペア:

[(1, 21311888), (2, 10655944), (4, 5327972), (8, 2663986), (13, 1639376), (16, 1331993), (26, 819688), (52, 409844), (104, 204922), (208, 102461)]