19943825

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{347}}^1$

素因数の和:398

約数の個数: 36

約数和(自身を含む): 28696080

約数和(自身を除く): 8752255

約数列:

[1, 5, 11, 19, 25, 55, 95, 121, 209, 275, 347, 475, 605, 1045, 1735, 2299, 3025, 3817, 5225, 6593, 8675, 11495, 19085, 32965, 41987, 57475, 72523, 95425, 164825, 209935, 362615, 797753, 1049675, 1813075, 3988765, 19943825]

約数ペア:

[(1, 19943825), (5, 3988765), (11, 1813075), (19, 1049675), (25, 797753), (55, 362615), (95, 209935), (121, 164825), (209, 95425), (275, 72523), (347, 57475), (475, 41987), (605, 32965), (1045, 19085), (1735, 11495), (2299, 8675), (3025, 6593), (3817, 5225)]