21141968

素因数分解:

$2^4\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{787}}^1$

素因数の和:891

約数の個数: 40

約数和(自身を含む): 43384128

約数和(自身を除く): 22242160

約数列:

[1, 2, 4, 8, 16, 23, 46, 73, 92, 146, 184, 292, 368, 584, 787, 1168, 1574, 1679, 3148, 3358, 6296, 6716, 12592, 13432, 18101, 26864, 36202, 57451, 72404, 114902, 144808, 229804, 289616, 459608, 919216, 1321373, 2642746, 5285492, 10570984, 21141968]

約数ペア:

[(1, 21141968), (2, 10570984), (4, 5285492), (8, 2642746), (16, 1321373), (23, 919216), (46, 459608), (73, 289616), (92, 229804), (146, 144808), (184, 114902), (292, 72404), (368, 57451), (584, 36202), (787, 26864), (1168, 18101), (1574, 13432), (1679, 12592), (3148, 6716), (3358, 6296)]