21091064

素因数分解:

$2^3\times {\mathrm{19}}^2\times {\mathrm{67}}^1\times {\mathrm{109}}^1$

素因数の和:220

約数の個数: 48

約数和(自身を含む): 42748200

約数和(自身を除く): 21657136

約数列:

[1, 2, 4, 8, 19, 38, 67, 76, 109, 134, 152, 218, 268, 361, 436, 536, 722, 872, 1273, 1444, 2071, 2546, 2888, 4142, 5092, 7303, 8284, 10184, 14606, 16568, 24187, 29212, 39349, 48374, 58424, 78698, 96748, 138757, 157396, 193496, 277514, 314792, 555028, 1110056, 2636383, 5272766, 10545532, 21091064]

約数ペア:

[(1, 21091064), (2, 10545532), (4, 5272766), (8, 2636383), (19, 1110056), (38, 555028), (67, 314792), (76, 277514), (109, 193496), (134, 157396), (152, 138757), (218, 96748), (268, 78698), (361, 58424), (436, 48374), (536, 39349), (722, 29212), (872, 24187), (1273, 16568), (1444, 14606), (2071, 10184), (2546, 8284), (2888, 7303), (4142, 5092)]