19001990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{353}}^1\times {\mathrm{769}}^1$

素因数の和:1136

約数の個数: 32

約数和(自身を含む): 39251520

約数和(自身を除く): 20249530

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 353, 706, 769, 1538, 1765, 2471, 3530, 3845, 4942, 5383, 7690, 10766, 12355, 24710, 26915, 53830, 271457, 542914, 1357285, 1900199, 2714570, 3800398, 9500995, 19001990]

約数ペア:

[(1, 19001990), (2, 9500995), (5, 3800398), (7, 2714570), (10, 1900199), (14, 1357285), (35, 542914), (70, 271457), (353, 53830), (706, 26915), (769, 24710), (1538, 12355), (1765, 10766), (2471, 7690), (3530, 5383), (3845, 4942)]