20403625

素因数分解:

$5^3\times {\mathrm{11}}^2\times {\mathrm{19}}^1\times {\mathrm{71}}^1$

素因数の和:127

約数の個数: 48

約数和(自身を含む): 29877120

約数和(自身を除く): 9473495

約数列:

[1, 5, 11, 19, 25, 55, 71, 95, 121, 125, 209, 275, 355, 475, 605, 781, 1045, 1349, 1375, 1775, 2299, 2375, 3025, 3905, 5225, 6745, 8591, 8875, 11495, 14839, 15125, 19525, 26125, 33725, 42955, 57475, 74195, 97625, 163229, 168625, 214775, 287375, 370975, 816145, 1073875, 1854875, 4080725, 20403625]

約数ペア:

[(1, 20403625), (5, 4080725), (11, 1854875), (19, 1073875), (25, 816145), (55, 370975), (71, 287375), (95, 214775), (121, 168625), (125, 163229), (209, 97625), (275, 74195), (355, 57475), (475, 42955), (605, 33725), (781, 26125), (1045, 19525), (1349, 15125), (1375, 14839), (1775, 11495), (2299, 8875), (2375, 8591), (3025, 6745), (3905, 5225)]