865100

素因数分解:

$2^2\times 5^2\times {\mathrm{41}}^1\times {\mathrm{211}}^1$

素因数の和:266

約数の個数: 36

約数和(自身を含む): 1932168

約数和(自身を除く): 1067068

約数列:

[1, 2, 4, 5, 10, 20, 25, 41, 50, 82, 100, 164, 205, 211, 410, 422, 820, 844, 1025, 1055, 2050, 2110, 4100, 4220, 5275, 8651, 10550, 17302, 21100, 34604, 43255, 86510, 173020, 216275, 432550, 865100]

約数ペア:

[(1, 865100), (2, 432550), (4, 216275), (5, 173020), (10, 86510), (20, 43255), (25, 34604), (41, 21100), (50, 17302), (82, 10550), (100, 8651), (164, 5275), (205, 4220), (211, 4100), (410, 2110), (422, 2050), (820, 1055), (844, 1025)]