21106378

素因数分解:

$2^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{12917}}^1$

素因数の和:12981

約数の個数: 16

約数和(自身を含む): 34103520

約数和(自身を除く): 12997142

約数列:

[1, 2, 19, 38, 43, 86, 817, 1634, 12917, 25834, 245423, 490846, 555431, 1110862, 10553189, 21106378]

約数ペア:

[(1, 21106378), (2, 10553189), (19, 1110862), (38, 555431), (43, 490846), (86, 245423), (817, 25834), (1634, 12917)]