21405704

素因数分解:

$2^3\times {\mathrm{19}}^1\times {\mathrm{140827}}^1$

素因数の和:140852

約数の個数: 16

約数和(自身を含む): 42248400

約数和(自身を除く): 20842696

約数列:

[1, 2, 4, 8, 19, 38, 76, 152, 140827, 281654, 563308, 1126616, 2675713, 5351426, 10702852, 21405704]

約数ペア:

[(1, 21405704), (2, 10702852), (4, 5351426), (8, 2675713), (19, 1126616), (38, 563308), (76, 281654), (152, 140827)]