21372464

素因数分解:

$2^4\times {\mathrm{67}}^1\times {\mathrm{19937}}^1$

素因数の和:20012

約数の個数: 20

約数和(自身を含む): 42029304

約数和(自身を除く): 20656840

約数列:

[1, 2, 4, 8, 16, 67, 134, 268, 536, 1072, 19937, 39874, 79748, 159496, 318992, 1335779, 2671558, 5343116, 10686232, 21372464]

約数ペア:

[(1, 21372464), (2, 10686232), (4, 5343116), (8, 2671558), (16, 1335779), (67, 318992), (134, 159496), (268, 79748), (536, 39874), (1072, 19937)]