21409936

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{78713}}^1$

素因数の和:78738

約数の個数: 20

約数和(自身を含む): 43922412

約数和(自身を除く): 22512476

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 78713, 157426, 314852, 629704, 1259408, 1338121, 2676242, 5352484, 10704968, 21409936]

約数ペア:

[(1, 21409936), (2, 10704968), (4, 5352484), (8, 2676242), (16, 1338121), (17, 1259408), (34, 629704), (68, 314852), (136, 157426), (272, 78713)]