21081524

素因数分解:

$2^2\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^2$

素因数の和:216

約数の個数: 36

約数和(自身を含む): 39938976

約数和(自身を除く): 18857452

約数列:

[1, 2, 4, 23, 43, 46, 73, 86, 92, 146, 172, 292, 989, 1679, 1978, 3139, 3358, 3956, 5329, 6278, 6716, 10658, 12556, 21316, 72197, 122567, 144394, 229147, 245134, 288788, 458294, 490268, 916588, 5270381, 10540762, 21081524]

約数ペア:

[(1, 21081524), (2, 10540762), (4, 5270381), (23, 916588), (43, 490268), (46, 458294), (73, 288788), (86, 245134), (92, 229147), (146, 144394), (172, 122567), (292, 72197), (989, 21316), (1679, 12556), (1978, 10658), (3139, 6716), (3358, 6278), (3956, 5329)]