1640005778

素因数分解:

$2^1\times {\mathrm{223}}^1\times {\mathrm{661}}^1\times {\mathrm{5563}}^1$

素因数の和:6449

約数の個数: 16

約数和(自身を含む): 2475223296

約数和(自身を除く): 835217518

約数列:

[1, 2, 223, 446, 661, 1322, 5563, 11126, 147403, 294806, 1240549, 2481098, 3677143, 7354286, 820002889, 1640005778]

約数ペア:

[(1, 1640005778), (2, 820002889), (223, 7354286), (446, 3677143), (661, 2481098), (1322, 1240549), (5563, 294806), (11126, 147403)]