1998198785

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{19973}}^1$

素因数の和:20113

約数の個数: 32

約数和(自身を含む): 2795720832

約数和(自身を除く): 797522047

約数列:

[1, 5, 11, 17, 55, 85, 107, 187, 535, 935, 1177, 1819, 5885, 9095, 19973, 20009, 99865, 100045, 219703, 339541, 1098515, 1697705, 2137111, 3734951, 10685555, 18674755, 23508221, 36330887, 117541105, 181654435, 399639757, 1998198785]

約数ペア:

[(1, 1998198785), (5, 399639757), (11, 181654435), (17, 117541105), (55, 36330887), (85, 23508221), (107, 18674755), (187, 10685555), (535, 3734951), (935, 2137111), (1177, 1697705), (1819, 1098515), (5885, 339541), (9095, 219703), (19973, 100045), (20009, 99865)]