21170416

素因数分解:

$2^4\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{199}}^1$

素因数の和:377

約数の個数: 40

約数和(自身を含む): 42284000

約数和(自身を除く): 21113584

約数列:

[1, 2, 4, 8, 16, 61, 109, 122, 199, 218, 244, 398, 436, 488, 796, 872, 976, 1592, 1744, 3184, 6649, 12139, 13298, 21691, 24278, 26596, 43382, 48556, 53192, 86764, 97112, 106384, 173528, 194224, 347056, 1323151, 2646302, 5292604, 10585208, 21170416]

約数ペア:

[(1, 21170416), (2, 10585208), (4, 5292604), (8, 2646302), (16, 1323151), (61, 347056), (109, 194224), (122, 173528), (199, 106384), (218, 97112), (244, 86764), (398, 53192), (436, 48556), (488, 43382), (796, 26596), (872, 24278), (976, 21691), (1592, 13298), (1744, 12139), (3184, 6649)]