21369784

素因数分解:

$2^3\times {\mathrm{67}}^1\times {\mathrm{39869}}^1$

素因数の和:39942

約数の個数: 16

約数和(自身を含む): 40667400

約数和(自身を除く): 19297616

約数列:

[1, 2, 4, 8, 67, 134, 268, 536, 39869, 79738, 159476, 318952, 2671223, 5342446, 10684892, 21369784]

約数ペア:

[(1, 21369784), (2, 10684892), (4, 5342446), (8, 2671223), (67, 318952), (134, 159476), (268, 79738), (536, 39869)]