21199568

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{101921}}^1$

素因数の和:101942

約数の個数: 20

約数和(自身を含む): 44234148

約数和(自身を除く): 23034580

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 101921, 203842, 407684, 815368, 1324973, 1630736, 2649946, 5299892, 10599784, 21199568]

約数ペア:

[(1, 21199568), (2, 10599784), (4, 5299892), (8, 2649946), (13, 1630736), (16, 1324973), (26, 815368), (52, 407684), (104, 203842), (208, 101921)]