20040860

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{257}}^1\times {\mathrm{557}}^1$

素因数の和:830

約数の個数: 48

約数和(自身を含む): 48371904

約数和(自身を除く): 28331044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 257, 514, 557, 1028, 1114, 1285, 1799, 2228, 2570, 2785, 3598, 3899, 5140, 5570, 7196, 7798, 8995, 11140, 15596, 17990, 19495, 35980, 38990, 77980, 143149, 286298, 572596, 715745, 1002043, 1431490, 2004086, 2862980, 4008172, 5010215, 10020430, 20040860]

約数ペア:

[(1, 20040860), (2, 10020430), (4, 5010215), (5, 4008172), (7, 2862980), (10, 2004086), (14, 1431490), (20, 1002043), (28, 715745), (35, 572596), (70, 286298), (140, 143149), (257, 77980), (514, 38990), (557, 35980), (1028, 19495), (1114, 17990), (1285, 15596), (1799, 11140), (2228, 8995), (2570, 7798), (2785, 7196), (3598, 5570), (3899, 5140)]