21995775

素因数分解:

$3^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{3371}}^1$

素因数の和:3416

約数の個数: 36

約数和(自身を含む): 40767480

約数和(自身を除く): 18771705

約数列:

[1, 3, 5, 9, 15, 25, 29, 45, 75, 87, 145, 225, 261, 435, 725, 1305, 2175, 3371, 6525, 10113, 16855, 30339, 50565, 84275, 97759, 151695, 252825, 293277, 488795, 758475, 879831, 1466385, 2443975, 4399155, 7331925, 21995775]

約数ペア:

[(1, 21995775), (3, 7331925), (5, 4399155), (9, 2443975), (15, 1466385), (25, 879831), (29, 758475), (45, 488795), (75, 293277), (87, 252825), (145, 151695), (225, 97759), (261, 84275), (435, 50565), (725, 30339), (1305, 16855), (2175, 10113), (3371, 6525)]