21281936

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{102317}}^1$

素因数の和:102338

約数の個数: 20

約数和(自身を含む): 44406012

約数和(自身を除く): 23124076

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 102317, 204634, 409268, 818536, 1330121, 1637072, 2660242, 5320484, 10640968, 21281936]

約数ペア:

[(1, 21281936), (2, 10640968), (4, 5320484), (8, 2660242), (13, 1637072), (16, 1330121), (26, 818536), (52, 409268), (104, 204634), (208, 102317)]