1998098725

素因数分解:

$5^2\times 7^2\times {\mathrm{1631101}}^1$

素因数の和:1631125

約数の個数: 18

約数和(自身を含む): 2882157234

約数和(自身を除く): 884058509

約数列:

[1, 5, 7, 25, 35, 49, 175, 245, 1225, 1631101, 8155505, 11417707, 40777525, 57088535, 79923949, 285442675, 399619745, 1998098725]

約数ペア:

[(1, 1998098725), (5, 399619745), (7, 285442675), (25, 79923949), (35, 57088535), (49, 40777525), (175, 11417707), (245, 8155505), (1225, 1631101)]