20369180

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{499}}^1$

素因数の和:678

約数の個数: 48

約数和(自身を含む): 46452000

約数和(自身を除く): 26082820

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 157, 260, 314, 499, 628, 785, 998, 1570, 1996, 2041, 2495, 3140, 4082, 4990, 6487, 8164, 9980, 10205, 12974, 20410, 25948, 32435, 40820, 64870, 78343, 129740, 156686, 313372, 391715, 783430, 1018459, 1566860, 2036918, 4073836, 5092295, 10184590, 20369180]

約数ペア:

[(1, 20369180), (2, 10184590), (4, 5092295), (5, 4073836), (10, 2036918), (13, 1566860), (20, 1018459), (26, 783430), (52, 391715), (65, 313372), (130, 156686), (157, 129740), (260, 78343), (314, 64870), (499, 40820), (628, 32435), (785, 25948), (998, 20410), (1570, 12974), (1996, 10205), (2041, 9980), (2495, 8164), (3140, 6487), (4082, 4990)]