21654155

素因数分解:

$5^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{43}}^1\times {\mathrm{151}}^1$

素因数の和:251

約数の個数: 32

約数和(自身を含む): 28892160

約数和(自身を除く): 7238005

約数列:

[1, 5, 23, 29, 43, 115, 145, 151, 215, 667, 755, 989, 1247, 3335, 3473, 4379, 4945, 6235, 6493, 17365, 21895, 28681, 32465, 100717, 143405, 149339, 188297, 503585, 746695, 941485, 4330831, 21654155]

約数ペア:

[(1, 21654155), (5, 4330831), (23, 941485), (29, 746695), (43, 503585), (115, 188297), (145, 149339), (151, 143405), (215, 100717), (667, 32465), (755, 28681), (989, 21895), (1247, 17365), (3335, 6493), (3473, 6235), (4379, 4945)]