40001990

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{691}}^1\times {\mathrm{827}}^1$

素因数の和:1532

約数の個数: 32

約数和(自身を含む): 82508544

約数和(自身を除く): 42506554

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 691, 827, 1382, 1654, 3455, 4135, 4837, 5789, 6910, 8270, 9674, 11578, 24185, 28945, 48370, 57890, 571457, 1142914, 2857285, 4000199, 5714570, 8000398, 20000995, 40001990]

約数ペア:

[(1, 40001990), (2, 20000995), (5, 8000398), (7, 5714570), (10, 4000199), (14, 2857285), (35, 1142914), (70, 571457), (691, 57890), (827, 48370), (1382, 28945), (1654, 24185), (3455, 11578), (4135, 9674), (4837, 8270), (5789, 6910)]