21391224

素因数分解:

$2^3\times 3^1\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{251}}^1$

素因数の和:380

約数の個数: 64

約数和(自身を含む): 55520640

約数和(自身を除く): 34129416

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 53, 67, 106, 134, 159, 201, 212, 251, 268, 318, 402, 424, 502, 536, 636, 753, 804, 1004, 1272, 1506, 1608, 2008, 3012, 3551, 6024, 7102, 10653, 13303, 14204, 16817, 21306, 26606, 28408, 33634, 39909, 42612, 50451, 53212, 67268, 79818, 85224, 100902, 106424, 134536, 159636, 201804, 319272, 403608, 891301, 1782602, 2673903, 3565204, 5347806, 7130408, 10695612, 21391224]

約数ペア:

[(1, 21391224), (2, 10695612), (3, 7130408), (4, 5347806), (6, 3565204), (8, 2673903), (12, 1782602), (24, 891301), (53, 403608), (67, 319272), (106, 201804), (134, 159636), (159, 134536), (201, 106424), (212, 100902), (251, 85224), (268, 79818), (318, 67268), (402, 53212), (424, 50451), (502, 42612), (536, 39909), (636, 33634), (753, 28408), (804, 26606), (1004, 21306), (1272, 16817), (1506, 14204), (1608, 13303), (2008, 10653), (3012, 7102), (3551, 6024)]