81780368

素因数分解:

$2^4\times {\mathrm{409}}^1\times {\mathrm{12497}}^1$

素因数の和:12914

約数の個数: 20

約数和(自身を含む): 158849580

約数和(自身を除く): 77069212

約数列:

[1, 2, 4, 8, 16, 409, 818, 1636, 3272, 6544, 12497, 24994, 49988, 99976, 199952, 5111273, 10222546, 20445092, 40890184, 81780368]

約数ペア:

[(1, 81780368), (2, 40890184), (4, 20445092), (8, 10222546), (16, 5111273), (409, 199952), (818, 99976), (1636, 49988), (3272, 24994), (6544, 12497)]