8989820

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{409}}^1$

素因数の和:582

約数の個数: 48

約数和(自身を含む): 21766080

約数和(自身を除く): 12776260

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 409, 628, 785, 818, 1099, 1570, 1636, 2045, 2198, 2863, 3140, 4090, 4396, 5495, 5726, 8180, 10990, 11452, 14315, 21980, 28630, 57260, 64213, 128426, 256852, 321065, 449491, 642130, 898982, 1284260, 1797964, 2247455, 4494910, 8989820]

約数ペア:

[(1, 8989820), (2, 4494910), (4, 2247455), (5, 1797964), (7, 1284260), (10, 898982), (14, 642130), (20, 449491), (28, 321065), (35, 256852), (70, 128426), (140, 64213), (157, 57260), (314, 28630), (409, 21980), (628, 14315), (785, 11452), (818, 10990), (1099, 8180), (1570, 5726), (1636, 5495), (2045, 4396), (2198, 4090), (2863, 3140)]