21509144

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{40129}}^1$

素因数の和:40202

約数の個数: 16

約数和(自身を含む): 40932600

約数和(自身を除く): 19423456

約数列:

[1, 2, 4, 8, 67, 134, 268, 536, 40129, 80258, 160516, 321032, 2688643, 5377286, 10754572, 21509144]

約数ペア:

[(1, 21509144), (2, 10754572), (4, 5377286), (8, 2688643), (67, 321032), (134, 160516), (268, 80258), (536, 40129)]